137920339 has 4 divisors (see below), whose sum is σ = 138275280. Its totient is φ = 137565400.

The previous prime is 137920313. The next prime is 137920357. The reversal of 137920339 is 933029731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933029731 = 29 ⋅32173439.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137920339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137920298 and 137920307.

It is not an unprimeable number, because it can be changed into a prime (137920369) 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, 176887 + ... + 177664.

It is an arithmetic number, because the mean of its divisors is an integer number (34568820).

Almost surely, 2^137920339 is an apocalyptic number.

137920339 is a deficient number, since it is larger than the sum of its proper divisors (354941).

137920339 is an equidigital number, since it uses as much as digits as its factorization.

137920339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354940.

The product of its (nonzero) digits is 30618, while the sum is 37.

The square root of 137920339 is about 11743.9490376960. The cubic root of 137920339 is about 516.6654712887.

The spelling of 137920339 in words is "one hundred thirty-seven million, nine hundred twenty thousand, three hundred thirty-nine".