99971023 has 2 divisors, whose sum is σ = 99971024. Its totient is φ = 99971022.

The previous prime is 99971017. The next prime is 99971051. The reversal of 99971023 is 32017999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99971023 - 2¹⁷ = 99839951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99971083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49985511 + 49985512.

It is an arithmetic number, because the mean of its divisors is an integer number (49985512).

Almost surely, 2^99971023 is an apocalyptic number.

99971023 is a deficient number, since it is larger than the sum of its proper divisors (1).

99971023 is an equidigital number, since it uses as much as digits as its factorization.

99971023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 99971023 is about 9998.5510450265. The cubic root of 99971023 is about 464.1140459236.

The spelling of 99971023 in words is "ninety-nine million, nine hundred seventy-one thousand, twenty-three".