3209124708409 has 3 divisors (see below), whose sum is σ = 3209126499813. Its totient is φ = 3209122917006.

The previous prime is 3209124708403. The next prime is 3209124708437. The reversal of 3209124708409 is 9048074219023.

The square root of 3209124708409 is 1791403.

It is a perfect power (a square), and thus also a powerful number.

3209124708409 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 3209124708409 - 2²¹ = 3209122611257 is a prime.

It is a super-3 number, since 3×3209124708409³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3209124708403) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 895702 + ... + 2687104.

It is an arithmetic number, because the mean of its divisors is an integer number (1069708833271).

Almost surely, 2^{3209124708409} is an apocalyptic number.

3209124708409 is the 1791403-rd square number.

3209124708409 is the 895702-nd centered octagonal number.

It is an amenable number.

3209124708409 is a deficient number, since it is larger than the sum of its proper divisors (1791404).

3209124708409 is an frugal number, since it uses more digits than its factorization.

3209124708409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582806 (or 1791403 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

Multiplying 3209124708409 by its sum of digits (49), we get a square (157247110712041 = 12539821²).

The spelling of 3209124708409 in words is "three trillion, two hundred nine billion, one hundred twenty-four million, seven hundred eight thousand, four hundred nine".