137839957 has 4 divisors (see below), whose sum is σ = 137892780. Its totient is φ = 137787136.

The previous prime is 137839873. The next prime is 137839979. The reversal of 137839957 is 759938731.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115476516 + 22363441 = 10746^2 + 4729^2 .

It is a cyclic number.

It is not a de Polignac number, because 137839957 - 2⁷ = 137839829 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 (137839057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22282 + ... + 27787.

It is an arithmetic number, because the mean of its divisors is an integer number (34473195).

Almost surely, 2^137839957 is an apocalyptic number.

It is an amenable number.

137839957 is a deficient number, since it is larger than the sum of its proper divisors (52823).

137839957 is an equidigital number, since it uses as much as digits as its factorization.

137839957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52822.

The product of its digits is 1428840, while the sum is 52.

The square root of 137839957 is about 11740.5262658877. The cubic root of 137839957 is about 516.5650783734.

The spelling of 137839957 in words is "one hundred thirty-seven million, eight hundred thirty-nine thousand, nine hundred fifty-seven".