80639331 has 4 divisors (see below), whose sum is σ = 107519112. Its totient is φ = 53759552.

The previous prime is 80639327. The next prime is 80639353. The reversal of 80639331 is 13393608.

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 80639331 - 2² = 80639327 is a prime.

It is a super-2 number, since 2×80639331² = 13005403408255122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80639292 and 80639301.

It is not an unprimeable number, because it can be changed into a prime (80639131) 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, 13439886 + ... + 13439891.

It is an arithmetic number, because the mean of its divisors is an integer number (26879778).

Almost surely, 2^80639331 is an apocalyptic number.

80639331 is a deficient number, since it is larger than the sum of its proper divisors (26879781).

80639331 is a wasteful number, since it uses less digits than its factorization.

80639331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26879780.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 80639331 is about 8979.9404786446. The cubic root of 80639331 is about 432.0317245649.

The spelling of 80639331 in words is "eighty million, six hundred thirty-nine thousand, three hundred thirty-one".