139749938 has 8 divisors (see below), whose sum is σ = 209980188. Its totient is φ = 69756544.

The previous prime is 139749899. The next prime is 139749971. The reversal of 139749938 is 839947931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 128210329 + 11539609 = 11323^2 + 3397^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 139749938.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 57731 + ... + 60102.

Almost surely, 2^139749938 is an apocalyptic number.

139749938 is a deficient number, since it is larger than the sum of its proper divisors (70230250).

139749938 is a wasteful number, since it uses less digits than its factorization.

139749938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118428.

The product of its digits is 1469664, while the sum is 53.

The square root of 139749938 is about 11821.5877952160. The cubic root of 139749938 is about 518.9400722556.

The spelling of 139749938 in words is "one hundred thirty-nine million, seven hundred forty-nine thousand, nine hundred thirty-eight".