80638973 has 4 divisors (see below), whose sum is σ = 85382460. Its totient is φ = 75895488.

The previous prime is 80638927. The next prime is 80638997. The reversal of 80638973 is 37983608.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38167684 + 42471289 = 6178^2 + 6517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80638973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80638273) 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, 2371718 + ... + 2371751.

It is an arithmetic number, because the mean of its divisors is an integer number (21345615).

Almost surely, 2^80638973 is an apocalyptic number.

It is an amenable number.

80638973 is a deficient number, since it is larger than the sum of its proper divisors (4743487).

80638973 is a wasteful number, since it uses less digits than its factorization.

80638973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743486.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 80638973 is about 8979.9205453055. The cubic root of 80638973 is about 432.0310852260.

The spelling of 80638973 in words is "eighty million, six hundred thirty-eight thousand, nine hundred seventy-three".