137691873 has 32 divisors (see below), whose sum is σ = 224294400. Its totient is φ = 82789200.

The previous prime is 137691859. The next prime is 137691877. The reversal of 137691873 is 378196731.

It is a de Polignac number, because none of the positive numbers 2^k-137691873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137691877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37138 + ... + 40676.

It is an arithmetic number, because the mean of its divisors is an integer number (7009200).

Almost surely, 2^137691873 is an apocalyptic number.

It is an amenable number.

137691873 is a deficient number, since it is larger than the sum of its proper divisors (86602527).

137691873 is a wasteful number, since it uses less digits than its factorization.

137691873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690 (or 3684 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 137691873 is about 11734.2180395628. The cubic root of 137691873 is about 516.3800269693.

The spelling of 137691873 in words is "one hundred thirty-seven million, six hundred ninety-one thousand, eight hundred seventy-three".