721932971 has 2 divisors, whose sum is σ = 721932972. Its totient is φ = 721932970.

The previous prime is 721932907. The next prime is 721932983. The reversal of 721932971 is 179239127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721932971 - 2⁶ = 721932907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (721962971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360966485 + 360966486.

It is an arithmetic number, because the mean of its divisors is an integer number (360966486).

Almost surely, 2^721932971 is an apocalyptic number.

721932971 is a deficient number, since it is larger than the sum of its proper divisors (1).

721932971 is an equidigital number, since it uses as much as digits as its factorization.

721932971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 41.

The square root of 721932971 is about 26868.8103756009. The cubic root of 721932971 is about 897.0823090340.

The spelling of 721932971 in words is "seven hundred twenty-one million, nine hundred thirty-two thousand, nine hundred seventy-one".