72238901 has 4 divisors (see below), whose sum is σ = 82558752. Its totient is φ = 61919052.

The previous prime is 72238889. The next prime is 72238919. The reversal of 72238901 is 10983227.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10983227 = 1453 ⋅7559.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72238901 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 (72238961) 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, 5159915 + ... + 5159928.

It is an arithmetic number, because the mean of its divisors is an integer number (20639688).

Almost surely, 2^72238901 is an apocalyptic number.

It is an amenable number.

72238901 is a deficient number, since it is larger than the sum of its proper divisors (10319851).

72238901 is a wasteful number, since it uses less digits than its factorization.

72238901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10319850.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 72238901 is about 8499.3470925713. The cubic root of 72238901 is about 416.4763808101.

The spelling of 72238901 in words is "seventy-two million, two hundred thirty-eight thousand, nine hundred one".