80639673 has 8 divisors (see below), whose sum is σ = 107825568. Its totient is φ = 53606784.

The previous prime is 80639651. The next prime is 80639681. The reversal of 80639673 is 37693608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80639673 - 2⁶ = 80639609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80639683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37015 + ... + 39132.

It is an arithmetic number, because the mean of its divisors is an integer number (13478196).

Almost surely, 2^80639673 is an apocalyptic number.

It is an amenable number.

80639673 is a deficient number, since it is larger than the sum of its proper divisors (27185895).

80639673 is a wasteful number, since it uses less digits than its factorization.

80639673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76503.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 80639673 is about 8979.9595210669. The cubic root of 80639673 is about 432.0323353283.

The spelling of 80639673 in words is "eighty million, six hundred thirty-nine thousand, six hundred seventy-three".