137120661 has 16 divisors (see below), whose sum is σ = 206587200. Its totient is φ = 89863344.

The previous prime is 137120647. The next prime is 137120681. The reversal of 137120661 is 166021731.

It is not a de Polignac number, because 137120661 - 2²¹ = 135023509 is a prime.

It is a super-3 number, since 3×137120661³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137120611) 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, 41446 + ... + 44631.

It is an arithmetic number, because the mean of its divisors is an integer number (12911700).

Almost surely, 2^137120661 is an apocalyptic number.

It is an amenable number.

137120661 is a deficient number, since it is larger than the sum of its proper divisors (69466539).

137120661 is an equidigital number, since it uses as much as digits as its factorization.

137120661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86145 (or 86139 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 137120661 is about 11709.8531587719. The cubic root of 137120661 is about 515.6649731655.

The spelling of 137120661 in words is "one hundred thirty-seven million, one hundred twenty thousand, six hundred sixty-one".