72738871 has 4 divisors (see below), whose sum is σ = 72786744. Its totient is φ = 72691000.

The previous prime is 72738863. The next prime is 72738881. The reversal of 72738871 is 17883727.

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 72738871 - 2³ = 72738863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72738851) 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, 21580 + ... + 24721.

It is an arithmetic number, because the mean of its divisors is an integer number (18196686).

Almost surely, 2^72738871 is an apocalyptic number.

72738871 is a deficient number, since it is larger than the sum of its proper divisors (47873).

72738871 is a wasteful number, since it uses less digits than its factorization.

72738871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47872.

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

The square root of 72738871 is about 8528.7086361301. The cubic root of 72738871 is about 417.4349924481.

The spelling of 72738871 in words is "seventy-two million, seven hundred thirty-eight thousand, eight hundred seventy-one".