72995939 has 2 divisors, whose sum is σ = 72995940. Its totient is φ = 72995938.

The previous prime is 72995911. The next prime is 72995941. The reversal of 72995939 is 93959927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72995939 - 2⁸ = 72995683 is a prime.

It is a super-2 number, since 2×72995939² = 10656814220983442, which contains 22 as substring.

Together with 72995941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72995959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36497969 + 36497970.

It is an arithmetic number, because the mean of its divisors is an integer number (36497970).

Almost surely, 2^72995939 is an apocalyptic number.

72995939 is a deficient number, since it is larger than the sum of its proper divisors (1).

72995939 is an equidigital number, since it uses as much as digits as its factorization.

72995939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1377810, while the sum is 53.

The square root of 72995939 is about 8543.7660899629. The cubic root of 72995939 is about 417.9261695873.

The spelling of 72995939 in words is "seventy-two million, nine hundred ninety-five thousand, nine hundred thirty-nine".