79677977 has 2 divisors, whose sum is σ = 79677978. Its totient is φ = 79677976.

The previous prime is 79677953. The next prime is 79678009. The reversal of 79677977 is 77977697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62900761 + 16777216 = 7931^2 + 4096^2 .

It is a cyclic number.

It is not a de Polignac number, because 79677977 - 2⁸ = 79677721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79677947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39838988 + 39838989.

It is an arithmetic number, because the mean of its divisors is an integer number (39838989).

Almost surely, 2^79677977 is an apocalyptic number.

It is an amenable number.

79677977 is a deficient number, since it is larger than the sum of its proper divisors (1).

79677977 is an equidigital number, since it uses as much as digits as its factorization.

79677977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8168202, while the sum is 59.

The square root of 79677977 is about 8926.2521250523. The cubic root of 79677977 is about 430.3080125946.

The spelling of 79677977 in words is "seventy-nine million, six hundred seventy-seven thousand, nine hundred seventy-seven".