137189957 has 4 divisors (see below), whose sum is σ = 137421900. Its totient is φ = 136958016.

The previous prime is 137189951. The next prime is 137189959. The reversal of 137189957 is 759981731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 759981731 = 107 ⋅7102633.

It can be written as a sum of positive squares in 2 ways, for example, as 86694721 + 50495236 = 9311^2 + 7106^2 .

It is a cyclic number.

It is not a de Polignac number, because 137189957 - 2⁶ = 137189893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137189951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115082 + ... + 116267.

It is an arithmetic number, because the mean of its divisors is an integer number (34355475).

Almost surely, 2^137189957 is an apocalyptic number.

It is an amenable number.

137189957 is a deficient number, since it is larger than the sum of its proper divisors (231943).

137189957 is an equidigital number, since it uses as much as digits as its factorization.

137189957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231942.

The product of its digits is 476280, while the sum is 50.

The square root of 137189957 is about 11712.8116607414. The cubic root of 137189957 is about 515.7518249011.

The spelling of 137189957 in words is "one hundred thirty-seven million, one hundred eighty-nine thousand, nine hundred fifty-seven".