3905875009 has 3 divisors (see below), whose sum is σ = 3905937507. Its totient is φ = 3905812512.

The previous prime is 3905874971. The next prime is 3905875013. The reversal of 3905875009 is 9005785093.

The square root of 3905875009 is 62497.

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

3905875009 is digitally balanced in base 2, because in such base 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 can be written as a sum of positive squares in only one way, i.e., 1433001025 + 2472873984 = 37855^2 + 49728^2 .

It is not a de Polignac number, because 3905875009 - 2¹³ = 3905866817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3905875009.

It is not an unprimeable number, because it can be changed into a prime (3905875609) 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, 31249 + ... + 93745.

It is an arithmetic number, because the mean of its divisors is an integer number (1301979169).

Almost surely, 2^3905875009 is an apocalyptic number.

3905875009 is the 62497-th square number.

3905875009 is the 31249-th centered octagonal number.

It is an amenable number.

3905875009 is a deficient number, since it is larger than the sum of its proper divisors (62498).

3905875009 is an frugal number, since it uses more digits than its factorization.

3905875009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124994 (or 62497 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 46.

The cubic root of 3905875009 is about 1574.8509151234.

The spelling of 3905875009 in words is "three billion, nine hundred five million, eight hundred seventy-five thousand, nine".