137872685 has 8 divisors (see below), whose sum is σ = 165702240. Its totient is φ = 110128144.

The previous prime is 137872681. The next prime is 137872687. The reversal of 137872685 is 586278731.

It is a happy number.

137872685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 137872685 - 2² = 137872681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137872681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17627 + ... + 24216.

It is an arithmetic number, because the mean of its divisors is an integer number (20712780).

Almost surely, 2^137872685 is an apocalyptic number.

It is an amenable number.

137872685 is a deficient number, since it is larger than the sum of its proper divisors (27829555).

137872685 is an equidigital number, since it uses as much as digits as its factorization.

137872685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42507.

The product of its digits is 564480, while the sum is 47.

The square root of 137872685 is about 11741.9199878044. The cubic root of 137872685 is about 516.6059586435.

The spelling of 137872685 in words is "one hundred thirty-seven million, eight hundred seventy-two thousand, six hundred eighty-five".