716421971 has 2 divisors, whose sum is σ = 716421972. Its totient is φ = 716421970.

The previous prime is 716421947. The next prime is 716422019. The reversal of 716421971 is 179124617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 716421971 - 2²⁶ = 649313107 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (716421931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358210985 + 358210986.

It is an arithmetic number, because the mean of its divisors is an integer number (358210986).

Almost surely, 2^716421971 is an apocalyptic number.

716421971 is a deficient number, since it is larger than the sum of its proper divisors (1).

716421971 is an equidigital number, since it uses as much as digits as its factorization.

716421971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 38.

The square root of 716421971 is about 26766.0600574683. The cubic root of 716421971 is about 894.7937982980.

The spelling of 716421971 in words is "seven hundred sixteen million, four hundred twenty-one thousand, nine hundred seventy-one".