79698961 has 2 divisors, whose sum is σ = 79698962. Its totient is φ = 79698960.

The previous prime is 79698953. The next prime is 79699003. The reversal of 79698961 is 16989697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78854400 + 844561 = 8880^2 + 919^2 .

It is a cyclic number.

It is not a de Polignac number, because 79698961 - 2³ = 79698953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79692961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39849480 + 39849481.

It is an arithmetic number, because the mean of its divisors is an integer number (39849481).

Almost surely, 2^79698961 is an apocalyptic number.

It is an amenable number.

79698961 is a deficient number, since it is larger than the sum of its proper divisors (1).

79698961 is an equidigital number, since it uses as much as digits as its factorization.

79698961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 55.

The square root of 79698961 is about 8927.4274570001. The cubic root of 79698961 is about 430.3457845993.

The spelling of 79698961 in words is "seventy-nine million, six hundred ninety-eight thousand, nine hundred sixty-one".