80936621 has 4 divisors (see below), whose sum is σ = 82818912. Its totient is φ = 79054332.

The previous prime is 80936617. The next prime is 80936627. The reversal of 80936621 is 12663908.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80936621 - 2² = 80936617 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 (80936627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 941081 + ... + 941166.

It is an arithmetic number, because the mean of its divisors is an integer number (20704728).

Almost surely, 2^80936621 is an apocalyptic number.

It is an amenable number.

80936621 is a deficient number, since it is larger than the sum of its proper divisors (1882291).

80936621 is a wasteful number, since it uses less digits than its factorization.

80936621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882290.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 80936621 is about 8996.4782554064. The cubic root of 80936621 is about 432.5619918491.

The spelling of 80936621 in words is "eighty million, nine hundred thirty-six thousand, six hundred twenty-one".