99972043 has 2 divisors, whose sum is σ = 99972044. Its totient is φ = 99972042.

The previous prime is 99972013. The next prime is 99972049. The reversal of 99972043 is 34027999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99972043 - 2¹⁷ = 99840971 is a prime.

It is not a weakly prime, because it can be changed into another prime (99972049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49986021 + 49986022.

It is an arithmetic number, because the mean of its divisors is an integer number (49986022).

Almost surely, 2^99972043 is an apocalyptic number.

99972043 is a deficient number, since it is larger than the sum of its proper divisors (1).

99972043 is an equidigital number, since it uses as much as digits as its factorization.

99972043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 99972043 is about 9998.6020522871. The cubic root of 99972043 is about 464.1156243634.

The spelling of 99972043 in words is "ninety-nine million, nine hundred seventy-two thousand, forty-three".