137143979 has 8 divisors (see below), whose sum is σ = 160071168. Its totient is φ = 115050600.

The previous prime is 137143973. The next prime is 137143991. The reversal of 137143979 is 979341731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137143979 - 2⁸ = 137143723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137143973) 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 7 ways as a sum of consecutive naturals, for example, 208097 + ... + 208754.

It is an arithmetic number, because the mean of its divisors is an integer number (20008896).

Almost surely, 2^137143979 is an apocalyptic number.

137143979 is a deficient number, since it is larger than the sum of its proper divisors (22927189).

137143979 is an equidigital number, since it uses as much as digits as its factorization.

137143979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416905.

The product of its digits is 142884, while the sum is 44.

The square root of 137143979 is about 11710.8487736799. The cubic root of 137143979 is about 515.6942019101.

The spelling of 137143979 in words is "one hundred thirty-seven million, one hundred forty-three thousand, nine hundred seventy-nine".