69772609 has 3 divisors (see below), whose sum is σ = 69780963. Its totient is φ = 69764256.

The previous prime is 69772603. The next prime is 69772613. The reversal of 69772609 is 90627796.

The square root of 69772609 is 8353.

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

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., 46036225 + 23736384 = 6785^2 + 4872^2 .

It is not a de Polignac number, because 69772609 - 2³ = 69772601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69772601) 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, 4177 + ... + 12529.

It is an arithmetic number, because the mean of its divisors is an integer number (23260321).

Almost surely, 2^69772609 is an apocalyptic number.

69772609 is the 8353-rd square number.

69772609 is the 4177-th centered octagonal number.

It is an amenable number.

69772609 is a deficient number, since it is larger than the sum of its proper divisors (8354).

69772609 is an frugal number, since it uses more digits than its factorization.

69772609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16706 (or 8353 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 46.

The cubic root of 69772609 is about 411.6817872318.

The spelling of 69772609 in words is "sixty-nine million, seven hundred seventy-two thousand, six hundred nine".