139539544 has 16 divisors (see below), whose sum is σ = 264335400. Its totient is φ = 69050112.

The previous prime is 139539527. The next prime is 139539563. The reversal of 139539544 is 445935931.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 139539544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89134 + ... + 90685.

Almost surely, 2^139539544 is an apocalyptic number.

It is an amenable number.

139539544 is a deficient number, since it is larger than the sum of its proper divisors (124795856).

139539544 is a wasteful number, since it uses less digits than its factorization.

139539544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179922 (or 179918 counting only the distinct ones).

The product of its digits is 291600, while the sum is 43.

The square root of 139539544 is about 11812.6857234077. The cubic root of 139539544 is about 518.6795194515.

The spelling of 139539544 in words is "one hundred thirty-nine million, five hundred thirty-nine thousand, five hundred forty-four".