80823721 has 8 divisors (see below), whose sum is σ = 88437024. Its totient is φ = 73254720.

The previous prime is 80823707. The next prime is 80823731. The reversal of 80823721 is 12732808.

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

It is not a de Polignac number, because 80823721 - 2⁹ = 80823209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80823731) 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, 7195 + ... + 14608.

It is an arithmetic number, because the mean of its divisors is an integer number (11054628).

Almost surely, 2^80823721 is an apocalyptic number.

It is an amenable number.

80823721 is a deficient number, since it is larger than the sum of its proper divisors (7613303).

80823721 is a wasteful number, since it uses less digits than its factorization.

80823721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22151.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 80823721 is about 8990.2013881781. The cubic root of 80823721 is about 432.3607686640.

The spelling of 80823721 in words is "eighty million, eight hundred twenty-three thousand, seven hundred twenty-one".