72232757 has 2 divisors, whose sum is σ = 72232758. Its totient is φ = 72232756.

The previous prime is 72232753. The next prime is 72232763. The reversal of 72232757 is 75723227.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71132356 + 1100401 = 8434^2 + 1049^2 .

It is a cyclic number.

It is not a de Polignac number, because 72232757 - 2² = 72232753 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72232751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36116378 + 36116379.

It is an arithmetic number, because the mean of its divisors is an integer number (36116379).

Almost surely, 2^72232757 is an apocalyptic number.

It is an amenable number.

72232757 is a deficient number, since it is larger than the sum of its proper divisors (1).

72232757 is an equidigital number, since it uses as much as digits as its factorization.

72232757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41160, while the sum is 35.

The square root of 72232757 is about 8498.9856453579. The cubic root of 72232757 is about 416.4645732134.

The spelling of 72232757 in words is "seventy-two million, two hundred thirty-two thousand, seven hundred fifty-seven".