72437539 has 4 divisors (see below), whose sum is σ = 72455040. Its totient is φ = 72420040.

The previous prime is 72437513. The next prime is 72437543. The reversal of 72437539 is 93573427.

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 72437539 - 2⁵ = 72437507 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72437639) 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, 1329 + ... + 12109.

It is an arithmetic number, because the mean of its divisors is an integer number (18113760).

Almost surely, 2^72437539 is an apocalyptic number.

72437539 is a deficient number, since it is larger than the sum of its proper divisors (17501).

72437539 is a wasteful number, since it uses less digits than its factorization.

72437539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17500.

The product of its digits is 158760, while the sum is 40.

The square root of 72437539 is about 8511.0245564209. The cubic root of 72437539 is about 416.8577649998.

The spelling of 72437539 in words is "seventy-two million, four hundred thirty-seven thousand, five hundred thirty-nine".