139945936 has 20 divisors (see below), whose sum is σ = 292003012. Its totient is φ = 64590336.

The previous prime is 139945933. The next prime is 139945937. The reversal of 139945936 is 639549931.

139945936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 32947600 + 106998336 = 5740^2 + 10344^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 139945936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139945933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336201 + ... + 336616.

Almost surely, 2^139945936 is an apocalyptic number.

139945936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139945936 is an abundant number, since it is smaller than the sum of its proper divisors (152057076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139945936 is a wasteful number, since it uses less digits than its factorization.

139945936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672838 (or 672832 counting only the distinct ones).

The product of its digits is 787320, while the sum is 49.

The square root of 139945936 is about 11829.8747246114. The cubic root of 139945936 is about 519.1825618172.

The spelling of 139945936 in words is "one hundred thirty-nine million, nine hundred forty-five thousand, nine hundred thirty-six".