72310999 has 2 divisors, whose sum is σ = 72311000. Its totient is φ = 72310998.

The previous prime is 72310967. The next prime is 72311021. The reversal of 72310999 is 99901327.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72310999 - 2⁵ = 72310967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72310939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36155499 + 36155500.

It is an arithmetic number, because the mean of its divisors is an integer number (36155500).

Almost surely, 2^72310999 is an apocalyptic number.

72310999 is a deficient number, since it is larger than the sum of its proper divisors (1).

72310999 is an equidigital number, since it uses as much as digits as its factorization.

72310999 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 72310999 is about 8503.5874194366. The cubic root of 72310999 is about 416.6148894239.

The spelling of 72310999 in words is "seventy-two million, three hundred ten thousand, nine hundred ninety-nine".