72738319 has 2 divisors, whose sum is σ = 72738320. Its totient is φ = 72738318.

The previous prime is 72738311. The next prime is 72738343. The reversal of 72738319 is 91383727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72738319 - 2³ = 72738311 is a prime.

It is a super-2 number, since 2×72738319² = 10581726101891522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72738311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36369159 + 36369160.

It is an arithmetic number, because the mean of its divisors is an integer number (36369160).

Almost surely, 2^72738319 is an apocalyptic number.

72738319 is a deficient number, since it is larger than the sum of its proper divisors (1).

72738319 is an equidigital number, since it uses as much as digits as its factorization.

72738319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 40.

The square root of 72738319 is about 8528.6762747803. The cubic root of 72738319 is about 417.4339365033.

The spelling of 72738319 in words is "seventy-two million, seven hundred thirty-eight thousand, three hundred nineteen".