137972722 has 12 divisors (see below), whose sum is σ = 216350190. Its totient is φ = 65986448.

The previous prime is 137972719. The next prime is 137972753. The reversal of 137972722 is 227279731.

137972722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 105698961 + 32273761 = 10281^2 + 5681^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64147 + ... + 66262.

Almost surely, 2^137972722 is an apocalyptic number.

137972722 is a deficient number, since it is larger than the sum of its proper divisors (78377468).

137972722 is a wasteful number, since it uses less digits than its factorization.

137972722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130457 (or 130434 counting only the distinct ones).

The product of its digits is 74088, while the sum is 40.

The square root of 137972722 is about 11746.1790383086. The cubic root of 137972722 is about 516.7308739259.

The spelling of 137972722 in words is "one hundred thirty-seven million, nine hundred seventy-two thousand, seven hundred twenty-two".