139599 has 6 divisors (see below), whose sum is σ = 201656. Its totient is φ = 93060.

The previous prime is 139597. The next prime is 139609. The reversal of 139599 is 995931.

It is not a de Polignac number, because 139599 - 2¹ = 139597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139599.

It is not an unprimeable number, because it can be changed into a prime (139591) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7747 + ... + 7764.

2¹³⁹⁵⁹⁹ is an apocalyptic number.

139599 is a deficient number, since it is larger than the sum of its proper divisors (62057).

139599 is a wasteful number, since it uses less digits than its factorization.

139599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15517 (or 15514 counting only the distinct ones).

The product of its digits is 10935, while the sum is 36.

The square root of 139599 is about 373.6294956237. The cubic root of 139599 is about 51.8753176542.

The spelling of 139599 in words is "one hundred thirty-nine thousand, five hundred ninety-nine".