72557923 has 2 divisors, whose sum is σ = 72557924. Its totient is φ = 72557922.

The previous prime is 72557917. The next prime is 72557929. The reversal of 72557923 is 32975527.

It is a balanced prime because it is at equal distance from previous prime (72557917) and next prime (72557929).

It is a cyclic number.

It is not a de Polignac number, because 72557923 - 2²¹ = 70460771 is a prime.

It is not a weakly prime, because it can be changed into another prime (72557929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36278961 + 36278962.

It is an arithmetic number, because the mean of its divisors is an integer number (36278962).

Almost surely, 2^72557923 is an apocalyptic number.

72557923 is a deficient number, since it is larger than the sum of its proper divisors (1).

72557923 is an equidigital number, since it uses as much as digits as its factorization.

72557923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 40.

The square root of 72557923 is about 8518.0938595439. The cubic root of 72557923 is about 417.0885626028.

The spelling of 72557923 in words is "seventy-two million, five hundred fifty-seven thousand, nine hundred twenty-three".