72328757 has 2 divisors, whose sum is σ = 72328758. Its totient is φ = 72328756.

The previous prime is 72328741. The next prime is 72328759. The reversal of 72328757 is 75782327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68541841 + 3786916 = 8279^2 + 1946^2 .

It is a cyclic number.

It is not a de Polignac number, because 72328757 - 2⁴ = 72328741 is a prime.

Together with 72328759, 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 (72328759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36164378 + 36164379.

It is an arithmetic number, because the mean of its divisors is an integer number (36164379).

Almost surely, 2^72328757 is an apocalyptic number.

It is an amenable number.

72328757 is a deficient number, since it is larger than the sum of its proper divisors (1).

72328757 is an equidigital number, since it uses as much as digits as its factorization.

72328757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164640, while the sum is 41.

The square root of 72328757 is about 8504.6315028930. The cubic root of 72328757 is about 416.6489904679.

The spelling of 72328757 in words is "seventy-two million, three hundred twenty-eight thousand, seven hundred fifty-seven".