72871139 has 8 divisors (see below), whose sum is σ = 79602480. Its totient is φ = 66157600.

The previous prime is 72871133. The next prime is 72871157. The reversal of 72871139 is 93117827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72871139 - 2²⁴ = 56093923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72871133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4997 + ... + 13065.

It is an arithmetic number, because the mean of its divisors is an integer number (9950310).

Almost surely, 2^72871139 is an apocalyptic number.

72871139 is a deficient number, since it is larger than the sum of its proper divisors (6731341).

72871139 is a wasteful number, since it uses less digits than its factorization.

72871139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8901.

The product of its digits is 21168, while the sum is 38.

The square root of 72871139 is about 8536.4593948545. The cubic root of 72871139 is about 417.6878598081.

The spelling of 72871139 in words is "seventy-two million, eight hundred seventy-one thousand, one hundred thirty-nine".