332972921 has 2 divisors, whose sum is σ = 332972922. Its totient is φ = 332972920.

The previous prime is 332972851. The next prime is 332972947. The reversal of 332972921 is 129279233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209207296 + 123765625 = 14464^2 + 11125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-332972921 is a prime.

It is a super-2 number, since 2×332972921² = 221741932238544482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (332972621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166486460 + 166486461.

It is an arithmetic number, because the mean of its divisors is an integer number (166486461).

Almost surely, 2^332972921 is an apocalyptic number.

It is an amenable number.

332972921 is a deficient number, since it is larger than the sum of its proper divisors (1).

332972921 is an equidigital number, since it uses as much as digits as its factorization.

332972921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 38.

The square root of 332972921 is about 18247.5456157808. The cubic root of 332972921 is about 693.1112882762. Note that the first 3 decimals are identical.

The spelling of 332972921 in words is "three hundred thirty-two million, nine hundred seventy-two thousand, nine hundred twenty-one".