137939786 has 16 divisors (see below), whose sum is σ = 220929984. Its totient is φ = 64436064.

The previous prime is 137939779. The next prime is 137939831. The reversal of 137939786 is 687939731.

It is a happy number.

137939786 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32891 + ... + 36846.

It is an arithmetic number, because the mean of its divisors is an integer number (13808124).

Almost surely, 2^137939786 is an apocalyptic number.

137939786 is a deficient number, since it is larger than the sum of its proper divisors (82990198).

137939786 is a wasteful number, since it uses less digits than its factorization.

137939786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69805.

The product of its digits is 1714608, while the sum is 53.

The square root of 137939786 is about 11744.7769668053. The cubic root of 137939786 is about 516.6897537146.

Subtracting 137939786 from its reverse (687939731), we obtain a palindrome (549999945).

The spelling of 137939786 in words is "one hundred thirty-seven million, nine hundred thirty-nine thousand, seven hundred eighty-six".