79994969 has 2 divisors, whose sum is σ = 79994970. Its totient is φ = 79994968.

The previous prime is 79994947. The next prime is 79995001. The reversal of 79994969 is 96949997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50694400 + 29300569 = 7120^2 + 5413^2 .

It is a cyclic number.

It is not a de Polignac number, because 79994969 - 2¹² = 79990873 is a prime.

It is a super-2 number, since 2×79994969² = 12798390130621922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79994909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39997484 + 39997485.

It is an arithmetic number, because the mean of its divisors is an integer number (39997485).

Almost surely, 2^79994969 is an apocalyptic number.

It is an amenable number.

79994969 is a deficient number, since it is larger than the sum of its proper divisors (1).

79994969 is an equidigital number, since it uses as much as digits as its factorization.

79994969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9920232, while the sum is 62.

The square root of 79994969 is about 8943.9906641275. The cubic root of 79994969 is about 430.8779053496.

The spelling of 79994969 in words is "seventy-nine million, nine hundred ninety-four thousand, nine hundred sixty-nine".