80978627 has 4 divisors (see below), whose sum is σ = 85240680. Its totient is φ = 76716576.

The previous prime is 80978617. The next prime is 80978657. The reversal of 80978627 is 72687908.

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 80978627 - 2²⁰ = 79930051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80978617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2130998 + ... + 2131035.

It is an arithmetic number, because the mean of its divisors is an integer number (21310170).

Almost surely, 2^80978627 is an apocalyptic number.

80978627 is a deficient number, since it is larger than the sum of its proper divisors (4262053).

80978627 is a wasteful number, since it uses less digits than its factorization.

80978627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262052.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 80978627 is about 8998.8125327734. The cubic root of 80978627 is about 432.6368119420.

The spelling of 80978627 in words is "eighty million, nine hundred seventy-eight thousand, six hundred twenty-seven".