72873187 has 4 divisors (see below), whose sum is σ = 72943576. Its totient is φ = 72802800.

The previous prime is 72873179. The next prime is 72873197. The reversal of 72873187 is 78137827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72873187 - 2³ = 72873179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72873127) 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, 33618 + ... + 35719.

It is an arithmetic number, because the mean of its divisors is an integer number (18235894).

Almost surely, 2^72873187 is an apocalyptic number.

72873187 is a deficient number, since it is larger than the sum of its proper divisors (70389).

72873187 is a wasteful number, since it uses less digits than its factorization.

72873187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70388.

The product of its digits is 131712, while the sum is 43.

The square root of 72873187 is about 8536.5793500676. The cubic root of 72873187 is about 417.6917727277.

The spelling of 72873187 in words is "seventy-two million, eight hundred seventy-three thousand, one hundred eighty-seven".