79680979 has 4 divisors (see below), whose sum is σ = 91063984. Its totient is φ = 68297976.

The previous prime is 79680977. The next prime is 79681001. The reversal of 79680979 is 97908697.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79680979 - 2¹ = 79680977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79680973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5691492 + ... + 5691505.

It is an arithmetic number, because the mean of its divisors is an integer number (22765996).

Almost surely, 2^79680979 is an apocalyptic number.

79680979 is a deficient number, since it is larger than the sum of its proper divisors (11383005).

79680979 is a wasteful number, since it uses less digits than its factorization.

79680979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11383004.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The square root of 79680979 is about 8926.4202791489. The cubic root of 79680979 is about 430.3134167162.

The spelling of 79680979 in words is "seventy-nine million, six hundred eighty thousand, nine hundred seventy-nine".