72387089 has 4 divisors (see below), whose sum is σ = 72411456. Its totient is φ = 72362724.

The previous prime is 72387067. The next prime is 72387113. The reversal of 72387089 is 98078327.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-72387089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72387389) 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, 6989 + ... + 13914.

It is an arithmetic number, because the mean of its divisors is an integer number (18102864).

Almost surely, 2^72387089 is an apocalyptic number.

It is an amenable number.

72387089 is a deficient number, since it is larger than the sum of its proper divisors (24367).

72387089 is a wasteful number, since it uses less digits than its factorization.

72387089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24366.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 72387089 is about 8508.0602372104. The cubic root of 72387089 is about 416.7609673139.

The spelling of 72387089 in words is "seventy-two million, three hundred eighty-seven thousand, eighty-nine".