80297921 has 8 divisors (see below), whose sum is σ = 87715488. Its totient is φ = 72900000.

The previous prime is 80297887. The next prime is 80297927. The reversal of 80297921 is 12979208.

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

It is a cyclic number.

It is not a de Polignac number, because 80297921 - 2²² = 76103617 is a prime.

It is a super-2 number, since 2×80297921² = 12895512233844482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80297927) 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, 4421 + ... + 13421.

It is an arithmetic number, because the mean of its divisors is an integer number (10964436).

Almost surely, 2^80297921 is an apocalyptic number.

It is an amenable number.

80297921 is a deficient number, since it is larger than the sum of its proper divisors (7417567).

80297921 is a wasteful number, since it uses less digits than its factorization.

80297921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9823.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 80297921 is about 8960.9107238048. The cubic root of 80297921 is about 431.4211515293.

It can be divided in two parts, 80297 and 921, that added together give a palindrome (81218).

The spelling of 80297921 in words is "eighty million, two hundred ninety-seven thousand, nine hundred twenty-one".