72397727 has 2 divisors, whose sum is σ = 72397728. Its totient is φ = 72397726.

The previous prime is 72397693. The next prime is 72397729. The reversal of 72397727 is 72779327.

It is a strong prime.

It is an emirp because it is prime and its reverse (72779327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72397727 - 2⁸ = 72397471 is a prime.

Together with 72397729, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72397729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36198863 + 36198864.

It is an arithmetic number, because the mean of its divisors is an integer number (36198864).

Almost surely, 2^72397727 is an apocalyptic number.

72397727 is a deficient number, since it is larger than the sum of its proper divisors (1).

72397727 is an equidigital number, since it uses as much as digits as its factorization.

72397727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259308, while the sum is 44.

The square root of 72397727 is about 8508.6853861216. The cubic root of 72397727 is about 416.7813820318.

The spelling of 72397727 in words is "seventy-two million, three hundred ninety-seven thousand, seven hundred twenty-seven".