139639696 has 40 divisors (see below), whose sum is σ = 310587264. Its totient is φ = 59577600.

The previous prime is 139639691. The next prime is 139639697. The reversal of 139639696 is 696936931.

It is not an unprimeable number, because it can be changed into a prime (139639691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23421 + ... + 28771.

Almost surely, 2^139639696 is an apocalyptic number.

139639696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139639696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155293632).

139639696 is an abundant number, since it is smaller than the sum of its proper divisors (170947568).

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

139639696 is a wasteful number, since it uses less digits than its factorization.

139639696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599 (or 5593 counting only the distinct ones).

The product of its digits is 1417176, while the sum is 52.

The square root of 139639696 is about 11816.9241344776. The cubic root of 139639696 is about 518.8035807432.

The spelling of 139639696 in words is "one hundred thirty-nine million, six hundred thirty-nine thousand, six hundred ninety-six".