72915453 has 12 divisors (see below), whose sum is σ = 113424220. Its totient is φ = 44870976.

The previous prime is 72915443. The next prime is 72915461. The reversal of 72915453 is 35451927.

It can be written as a sum of positive squares in 2 ways, for example, as 35497764 + 37417689 = 5958^2 + 6117^2 .

It is not a de Polignac number, because 72915453 - 2¹⁷ = 72784381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72915433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311488 + ... + 311721.

Almost surely, 2^72915453 is an apocalyptic number.

It is an amenable number.

72915453 is a deficient number, since it is larger than the sum of its proper divisors (40508767).

72915453 is a wasteful number, since it uses less digits than its factorization.

72915453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623228 (or 623225 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 72915453 is about 8539.0545729606. The cubic root of 72915453 is about 417.7725100065.

The spelling of 72915453 in words is "seventy-two million, nine hundred fifteen thousand, four hundred fifty-three".