137725685 has 4 divisors (see below), whose sum is σ = 165270828. Its totient is φ = 110180544.

The previous prime is 137725673. The next prime is 137725691. The reversal of 137725685 is 586527731.

It is a happy number.

137725685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586527731 = 1151 ⋅509581.

It can be written as a sum of positive squares in 2 ways, for example, as 23107249 + 114618436 = 4807^2 + 10706^2 .

It is a cyclic number.

It is not a de Polignac number, because 137725685 - 2¹⁸ = 137463541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13772564 + ... + 13772573.

It is an arithmetic number, because the mean of its divisors is an integer number (41317707).

Almost surely, 2^137725685 is an apocalyptic number.

It is an amenable number.

137725685 is a deficient number, since it is larger than the sum of its proper divisors (27545143).

137725685 is an equidigital number, since it uses as much as digits as its factorization.

137725685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27545142.

The product of its digits is 352800, while the sum is 44.

The square root of 137725685 is about 11735.6586947644. The cubic root of 137725685 is about 516.4222914160.

The spelling of 137725685 in words is "one hundred thirty-seven million, seven hundred twenty-five thousand, six hundred eighty-five".