72539189 has 8 divisors (see below), whose sum is σ = 74500608. Its totient is φ = 70595280.

The previous prime is 72539177. The next prime is 72539227. The reversal of 72539189 is 98193527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72539189 - 2⁸ = 72538933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72539149) 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 7 ways as a sum of consecutive naturals, for example, 4244 + ... + 12770.

It is an arithmetic number, because the mean of its divisors is an integer number (9312576).

Almost surely, 2^72539189 is an apocalyptic number.

It is an amenable number.

72539189 is a deficient number, since it is larger than the sum of its proper divisors (1961419).

72539189 is a wasteful number, since it uses less digits than its factorization.

72539189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755.

The product of its digits is 136080, while the sum is 44.

The square root of 72539189 is about 8516.9941293863. The cubic root of 72539189 is about 417.0526629638.

The spelling of 72539189 in words is "seventy-two million, five hundred thirty-nine thousand, one hundred eighty-nine".