72897839 has 6 divisors (see below), whose sum is σ = 84799584. Its totient is φ = 62483820.

The previous prime is 72897827. The next prime is 72897841. The reversal of 72897839 is 93879827.

It is not a de Polignac number, because 72897839 - 2⁴ = 72897823 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 (72897859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 743807 + ... + 743904.

It is an arithmetic number, because the mean of its divisors is an integer number (14133264).

Almost surely, 2^72897839 is an apocalyptic number.

72897839 is a deficient number, since it is larger than the sum of its proper divisors (11901745).

72897839 is a wasteful number, since it uses less digits than its factorization.

72897839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487725 (or 1487718 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 53.

The square root of 72897839 is about 8538.0231318497. The cubic root of 72897839 is about 417.7388672175.

The spelling of 72897839 in words is "seventy-two million, eight hundred ninety-seven thousand, eight hundred thirty-nine".