79263409 has 9 divisors (see below), whose sum is σ = 82359147. Its totient is φ = 76280904.

The previous prime is 79263397. The next prime is 79263413. The reversal of 79263409 is 90436297.

The square root of 79263409 is 8903.

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

It can be written as a sum of positive squares in only one way, i.e., 41563809 + 37699600 = 6447^2 + 6140^2 .

It is not a de Polignac number, because 79263409 - 2²³ = 70874801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79263419) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 258034 + ... + 258340.

Almost surely, 2^79263409 is an apocalyptic number.

79263409 is the 8903-rd square number.

79263409 is the 4452-nd centered octagonal number.

It is an amenable number.

79263409 is a deficient number, since it is larger than the sum of its proper divisors (3095738).

79263409 is an frugal number, since it uses more digits than its factorization.

79263409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The cubic root of 79263409 is about 429.5604106849.

The spelling of 79263409 in words is "seventy-nine million, two hundred sixty-three thousand, four hundred nine".