72597373 has 4 divisors (see below), whose sum is σ = 74285728. Its totient is φ = 70909020.

The previous prime is 72597341. The next prime is 72597383. The reversal of 72597373 is 37379527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37379527 = 1381 ⋅27067.

It is a cyclic number.

It is not a de Polignac number, because 72597373 - 2⁵ = 72597341 is a prime.

It is a super-2 number, since 2×72597373² = 10540757133002258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 1688311 = 72597373 / (7 + 2 + 5 + 9 + 7 + 3 + 7 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72597313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844113 + ... + 844198.

It is an arithmetic number, because the mean of its divisors is an integer number (18571432).

Almost surely, 2^72597373 is an apocalyptic number.

It is an amenable number.

72597373 is a deficient number, since it is larger than the sum of its proper divisors (1688355).

72597373 is a wasteful number, since it uses less digits than its factorization.

72597373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688354.

The product of its digits is 277830, while the sum is 43.

The square root of 72597373 is about 8520.4092037883. The cubic root of 72597373 is about 417.1641397507.

The spelling of 72597373 in words is "seventy-two million, five hundred ninety-seven thousand, three hundred seventy-three".