72907839 has 6 divisors (see below), whose sum is σ = 105311336. Its totient is φ = 48605220.

The previous prime is 72907837. The next prime is 72907847. The reversal of 72907839 is 93870927.

It is not a de Polignac number, because 72907839 - 2¹ = 72907837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72907794 and 72907803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72907837) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4050427 + ... + 4050444.

Almost surely, 2^72907839 is an apocalyptic number.

72907839 is a deficient number, since it is larger than the sum of its proper divisors (32403497).

72907839 is a wasteful number, since it uses less digits than its factorization.

72907839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8100877 (or 8100874 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 72907839 is about 8538.6087274216. The cubic root of 72907839 is about 417.7579679102.

It can be divided in two parts, 7290 and 7839, that added together give a square (15129 = 123²).

The spelling of 72907839 in words is "seventy-two million, nine hundred seven thousand, eight hundred thirty-nine".