72957187 has 4 divisors (see below), whose sum is σ = 73008256. Its totient is φ = 72906120.

The previous prime is 72957107. The next prime is 72957191. The reversal of 72957187 is 78175927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78175927 = 233 ⋅335519.

It is a cyclic number.

It is not a de Polignac number, because 72957187 - 2¹⁵ = 72924419 is a prime.

It is a super-2 number, since 2×72957187² = 10645502269905938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72957107) 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, 23328 + ... + 26269.

It is an arithmetic number, because the mean of its divisors is an integer number (18252064).

Almost surely, 2^72957187 is an apocalyptic number.

72957187 is a deficient number, since it is larger than the sum of its proper divisors (51069).

72957187 is a wasteful number, since it uses less digits than its factorization.

72957187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51068.

The product of its digits is 246960, while the sum is 46.

The square root of 72957187 is about 8541.4979365449. The cubic root of 72957187 is about 417.8522004418.

The spelling of 72957187 in words is "seventy-two million, nine hundred fifty-seven thousand, one hundred eighty-seven".