79124977 has 2 divisors, whose sum is σ = 79124978. Its totient is φ = 79124976.

The previous prime is 79124939. The next prime is 79124993. The reversal of 79124977 is 77942197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78694641 + 430336 = 8871^2 + 656^2 .

It is an emirp because it is prime and its reverse (77942197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79124977 - 2⁷ = 79124849 is a prime.

It is not a weakly prime, because it can be changed into another prime (79124377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39562488 + 39562489.

It is an arithmetic number, because the mean of its divisors is an integer number (39562489).

Almost surely, 2^79124977 is an apocalyptic number.

It is an amenable number.

79124977 is a deficient number, since it is larger than the sum of its proper divisors (1).

79124977 is an equidigital number, since it uses as much as digits as its factorization.

79124977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 46.

The square root of 79124977 is about 8895.2221444998. Note that the first 3 decimals coincide. The cubic root of 79124977 is about 429.3101919974.

The spelling of 79124977 in words is "seventy-nine million, one hundred twenty-four thousand, nine hundred seventy-seven".