72113722 has 4 divisors (see below), whose sum is σ = 108170586. Its totient is φ = 36056860.

The previous prime is 72113689. The next prime is 72113731. The reversal of 72113722 is 22731127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72097081 + 16641 = 8491^2 + 129^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 18028429 + ... + 18028432.

Almost surely, 2^72113722 is an apocalyptic number.

72113722 is a deficient number, since it is larger than the sum of its proper divisors (36056864).

72113722 is a wasteful number, since it uses less digits than its factorization.

72113722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36056863.

The product of its digits is 1176, while the sum is 25.

The square root of 72113722 is about 8491.9798633770. The cubic root of 72113722 is about 416.2356783693.

Adding to 72113722 its reverse (22731127), we get a palindrome (94844849).

The spelling of 72113722 in words is "seventy-two million, one hundred thirteen thousand, seven hundred twenty-two".