72732739 has 6 divisors (see below), whose sum is σ = 76033076. Its totient is φ = 69569940.

The previous prime is 72732731. The next prime is 72732767. The reversal of 72732739 is 93723727.

It is not a de Polignac number, because 72732739 - 2³ = 72732731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72732731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68217 + ... + 69274.

Almost surely, 2^72732739 is an apocalyptic number.

72732739 is a deficient number, since it is larger than the sum of its proper divisors (3300337).

72732739 is a wasteful number, since it uses less digits than its factorization.

72732739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137537 (or 137514 counting only the distinct ones).

The product of its digits is 111132, while the sum is 40.

The square root of 72732739 is about 8528.3491368494. The cubic root of 72732739 is about 417.4232619787.

The spelling of 72732739 in words is "seventy-two million, seven hundred thirty-two thousand, seven hundred thirty-nine".