137979 has 6 divisors (see below), whose sum is σ = 199316. Its totient is φ = 91980.

The previous prime is 137957. The next prime is 137983. The reversal of 137979 is 979731.

It is not a de Polignac number, because 137979 - 2⁵ = 137947 is a prime.

It is a Duffinian number.

137979 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (137909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7657 + ... + 7674.

2¹³⁷⁹⁷⁹ is an apocalyptic number.

137979 is a deficient number, since it is larger than the sum of its proper divisors (61337).

137979 is a wasteful number, since it uses less digits than its factorization.

137979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15337 (or 15334 counting only the distinct ones).

The product of its digits is 11907, while the sum is 36.

The square root of 137979 is about 371.4552462949. The cubic root of 137979 is about 51.6738711193.

The spelling of 137979 in words is "one hundred thirty-seven thousand, nine hundred seventy-nine".