80868979 has 2 divisors, whose sum is σ = 80868980. Its totient is φ = 80868978.

The previous prime is 80868971. The next prime is 80869007. The reversal of 80868979 is 97986808.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80868979 - 2³ = 80868971 is a prime.

It is not a weakly prime, because it can be changed into another prime (80868971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40434489 + 40434490.

It is an arithmetic number, because the mean of its divisors is an integer number (40434490).

Almost surely, 2^80868979 is an apocalyptic number.

80868979 is a deficient number, since it is larger than the sum of its proper divisors (1).

80868979 is an equidigital number, since it uses as much as digits as its factorization.

80868979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The square root of 80868979 is about 8992.7181096707. The cubic root of 80868979 is about 432.4414550935.

The spelling of 80868979 in words is "eighty million, eight hundred sixty-eight thousand, nine hundred seventy-nine".