139685432 has 16 divisors (see below), whose sum is σ = 264611760. Its totient is φ = 69122304.

The previous prime is 139685423. The next prime is 139685437. The reversal of 139685432 is 234586931.

It is a self number, because there is not a number n which added to its sum of digits gives 139685432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139685437) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 89228 + ... + 90779.

It is an arithmetic number, because the mean of its divisors is an integer number (16538235).

Almost surely, 2^139685432 is an apocalyptic number.

It is an amenable number.

139685432 is a deficient number, since it is larger than the sum of its proper divisors (124926328).

139685432 is a wasteful number, since it uses less digits than its factorization.

139685432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180110 (or 180106 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 139685432 is about 11818.8591666032. The cubic root of 139685432 is about 518.8602155712.

The spelling of 139685432 in words is "one hundred thirty-nine million, six hundred eighty-five thousand, four hundred thirty-two".