72801187 has 4 divisors (see below), whose sum is σ = 75966480. Its totient is φ = 69635896.

The previous prime is 72801181. The next prime is 72801227. The reversal of 72801187 is 78110827.

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 72801187 - 2¹⁵ = 72768419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72801181) 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, 1582612 + ... + 1582657.

It is an arithmetic number, because the mean of its divisors is an integer number (18991620).

Almost surely, 2^72801187 is an apocalyptic number.

72801187 is a deficient number, since it is larger than the sum of its proper divisors (3165293).

72801187 is a wasteful number, since it uses less digits than its factorization.

72801187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165292.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 72801187 is about 8532.3611620700. The cubic root of 72801187 is about 417.5541651073.

The spelling of 72801187 in words is "seventy-two million, eight hundred one thousand, one hundred eighty-seven".