79992769 has 8 divisors (see below), whose sum is σ = 85169448. Its totient is φ = 74868480.

The previous prime is 79992767. The next prime is 79992791. The reversal of 79992769 is 96729997.

It can be written as a sum of positive squares in 4 ways, for example, as 69169 + 79923600 = 263^2 + 8940^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79992769 - 2¹ = 79992767 is a prime.

It is a super-2 number, since 2×79992769² = 12797686184574722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79992767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9922 + ... + 16075.

It is an arithmetic number, because the mean of its divisors is an integer number (10646181).

Almost surely, 2^79992769 is an apocalyptic number.

It is an amenable number.

79992769 is a deficient number, since it is larger than the sum of its proper divisors (5176679).

79992769 is a wasteful number, since it uses less digits than its factorization.

79992769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26195.

The product of its digits is 3857868, while the sum is 58.

The square root of 79992769 is about 8943.8676756759. The cubic root of 79992769 is about 430.8739553508.

The spelling of 79992769 in words is "seventy-nine million, nine hundred ninety-two thousand, seven hundred sixty-nine".