9137972 has 6 divisors (see below), whose sum is σ = 15991458. Its totient is φ = 4568984.

The previous prime is 9137951. The next prime is 9137981. The reversal of 9137972 is 2797319.

It can be written as a sum of positive squares in only one way, i.e., 5550736 + 3587236 = 2356^2 + 1894^2 .

It is a congruent number.

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, 1142243 + ... + 1142250.

It is an arithmetic number, because the mean of its divisors is an integer number (2665243).

Almost surely, 2^9137972 is an apocalyptic number.

It is an amenable number.

9137972 is a deficient number, since it is larger than the sum of its proper divisors (6853486).

9137972 is a wasteful number, since it uses less digits than its factorization.

9137972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284497 (or 2284495 counting only the distinct ones).

The product of its digits is 23814, while the sum is 38.

The square root of 9137972 is about 3022.9078715700. The cubic root of 9137972 is about 209.0659346467.

The spelling of 9137972 in words is "nine million, one hundred thirty-seven thousand, nine hundred seventy-two".