79548977 has 2 divisors, whose sum is σ = 79548978. Its totient is φ = 79548976.

The previous prime is 79548923. The next prime is 79548983. The reversal of 79548977 is 77984597.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78836641 + 712336 = 8879^2 + 844^2 .

It is an emirp because it is prime and its reverse (77984597) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79548977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79548907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39774488 + 39774489.

It is an arithmetic number, because the mean of its divisors is an integer number (39774489).

Almost surely, 2^79548977 is an apocalyptic number.

It is an amenable number.

79548977 is a deficient number, since it is larger than the sum of its proper divisors (1).

79548977 is an equidigital number, since it uses as much as digits as its factorization.

79548977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 56.

The square root of 79548977 is about 8919.0233209696. The cubic root of 79548977 is about 430.0756618257.

The spelling of 79548977 in words is "seventy-nine million, five hundred forty-eight thousand, nine hundred seventy-seven".