137691685 has 16 divisors (see below), whose sum is σ = 173093760. Its totient is φ = 104948800.

The previous prime is 137691683. The next prime is 137691703. The reversal of 137691685 is 586196731.

It is a happy number.

It is not a de Polignac number, because 137691685 - 2¹ = 137691683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137691683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28710 + ... + 33160.

It is an arithmetic number, because the mean of its divisors is an integer number (10818360).

Almost surely, 2^137691685 is an apocalyptic number.

It is an amenable number.

137691685 is a deficient number, since it is larger than the sum of its proper divisors (35402075).

137691685 is a wasteful number, since it uses less digits than its factorization.

137691685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4748.

The product of its digits is 272160, while the sum is 46.

The square root of 137691685 is about 11734.2100288004. The cubic root of 137691685 is about 516.3797919530.

The spelling of 137691685 in words is "one hundred thirty-seven million, six hundred ninety-one thousand, six hundred eighty-five".