72135489 has 16 divisors (see below), whose sum is σ = 98100864. Its totient is φ = 47136000.

The previous prime is 72135473. The next prime is 72135493. The reversal of 72135489 is 98453127.

It is not a de Polignac number, because 72135489 - 2⁴ = 72135473 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72135409) 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 15 ways as a sum of consecutive naturals, for example, 72892 + ... + 73874.

It is an arithmetic number, because the mean of its divisors is an integer number (6131304).

Almost surely, 2^72135489 is an apocalyptic number.

It is an amenable number.

72135489 is a deficient number, since it is larger than the sum of its proper divisors (25965375).

72135489 is a wasteful number, since it uses less digits than its factorization.

72135489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448.

The product of its digits is 60480, while the sum is 39.

The square root of 72135489 is about 8493.2613877120. The cubic root of 72135489 is about 416.2775533890.

The spelling of 72135489 in words is "seventy-two million, one hundred thirty-five thousand, four hundred eighty-nine".