79772969 has 2 divisors, whose sum is σ = 79772970. Its totient is φ = 79772968.

The previous prime is 79772911. The next prime is 79772971. The reversal of 79772969 is 96927797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77228944 + 2544025 = 8788^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 79772969 - 2¹² = 79768873 is a prime.

It is a super-2 number, since 2×79772969² = 12727453166149922, which contains 22 as substring.

Together with 79772971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79772369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39886484 + 39886485.

It is an arithmetic number, because the mean of its divisors is an integer number (39886485).

Almost surely, 2^79772969 is an apocalyptic number.

It is an amenable number.

79772969 is a deficient number, since it is larger than the sum of its proper divisors (1).

79772969 is an equidigital number, since it uses as much as digits as its factorization.

79772969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000564, while the sum is 56.

The square root of 79772969 is about 8931.5714742704. The cubic root of 79772969 is about 430.4789489352.

The spelling of 79772969 in words is "seventy-nine million, seven hundred seventy-two thousand, nine hundred sixty-nine".