72737189 has 4 divisors (see below), whose sum is σ = 83128224. Its totient is φ = 62346156.

The previous prime is 72737183. The next prime is 72737207. The reversal of 72737189 is 98173727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72737189 - 2¹² = 72733093 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 (72737183) 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 3 ways as a sum of consecutive naturals, for example, 5195507 + ... + 5195520.

It is an arithmetic number, because the mean of its divisors is an integer number (20782056).

Almost surely, 2^72737189 is an apocalyptic number.

It is an amenable number.

72737189 is a deficient number, since it is larger than the sum of its proper divisors (10391035).

72737189 is a wasteful number, since it uses less digits than its factorization.

72737189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10391034.

The product of its digits is 148176, while the sum is 44.

The square root of 72737189 is about 8528.6100274312. The cubic root of 72737189 is about 417.4317748605.

It can be divided in two parts, 7273718 and 9, that added together give a palindrome (7273727).

The spelling of 72737189 in words is "seventy-two million, seven hundred thirty-seven thousand, one hundred eighty-nine".