72531373 has 2 divisors, whose sum is σ = 72531374. Its totient is φ = 72531372.

The previous prime is 72531353. The next prime is 72531377. The reversal of 72531373 is 37313527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65577604 + 6953769 = 8098^2 + 2637^2 .

It is an emirp because it is prime and its reverse (37313527) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72531373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72531377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36265686 + 36265687.

It is an arithmetic number, because the mean of its divisors is an integer number (36265687).

Almost surely, 2^72531373 is an apocalyptic number.

It is an amenable number.

72531373 is a deficient number, since it is larger than the sum of its proper divisors (1).

72531373 is an equidigital number, since it uses as much as digits as its factorization.

72531373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 31.

The square root of 72531373 is about 8516.5352696974. The cubic root of 72531373 is about 417.0376834714.

The spelling of 72531373 in words is "seventy-two million, five hundred thirty-one thousand, three hundred seventy-three".