137831661 has 24 divisors (see below), whose sum is σ = 220259520. Its totient is φ = 82353600.

The previous prime is 137831653. The next prime is 137831669. The reversal of 137831661 is 166138731.

137831661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (137831653) and next prime (137831669).

It is not a de Polignac number, because 137831661 - 2³ = 137831653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137831669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2776 + ... + 16833.

It is an arithmetic number, because the mean of its divisors is an integer number (9177480).

Almost surely, 2^137831661 is an apocalyptic number.

137831661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

137831661 is a deficient number, since it is larger than the sum of its proper divisors (82427859).

137831661 is a wasteful number, since it uses less digits than its factorization.

137831661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19697 (or 19694 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 137831661 is about 11740.1729544330. The cubic root of 137831661 is about 516.5547148814.

The spelling of 137831661 in words is "one hundred thirty-seven million, eight hundred thirty-one thousand, six hundred sixty-one".