137939798 has 4 divisors (see below), whose sum is σ = 206909700. Its totient is φ = 68969898.

The previous prime is 137939779. The next prime is 137939831. The reversal of 137939798 is 897939731.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 34484948 + ... + 34484951.

It is an arithmetic number, because the mean of its divisors is an integer number (51727425).

Almost surely, 2^137939798 is an apocalyptic number.

137939798 is a deficient number, since it is larger than the sum of its proper divisors (68969902).

137939798 is an equidigital number, since it uses as much as digits as its factorization.

137939798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68969901.

The product of its digits is 2571912, while the sum is 56.

The square root of 137939798 is about 11744.7774776707. Note that the first 3 decimals coincide. The cubic root of 137939798 is about 516.6897686976.

The spelling of 137939798 in words is "one hundred thirty-seven million, nine hundred thirty-nine thousand, seven hundred ninety-eight".