79007869 has 2 divisors, whose sum is σ = 79007870. Its totient is φ = 79007868.

The previous prime is 79007801. The next prime is 79007911. The reversal of 79007869 is 96870097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57198969 + 21808900 = 7563^2 + 4670^2 .

It is a cyclic number.

It is not a de Polignac number, because 79007869 - 2²⁵ = 45453437 is a prime.

It is a super-2 number, since 2×79007869² = 12484486727842322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79007569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39503934 + 39503935.

It is an arithmetic number, because the mean of its divisors is an integer number (39503935).

Almost surely, 2^79007869 is an apocalyptic number.

It is an amenable number.

79007869 is a deficient number, since it is larger than the sum of its proper divisors (1).

79007869 is an equidigital number, since it uses as much as digits as its factorization.

79007869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 79007869 is about 8888.6370721275. The cubic root of 79007869 is about 429.0982889061.

The spelling of 79007869 in words is "seventy-nine million, seven thousand, eight hundred sixty-nine".