139799 has 8 divisors (see below), whose sum is σ = 155520. Its totient is φ = 124600.

The previous prime is 139787. The next prime is 139801. The reversal of 139799 is 997931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139799 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 139799.

It is not an unprimeable number, because it can be changed into a prime (139709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692 + ... + 870.

It is an arithmetic number, because the mean of its divisors is an integer number (19440).

2¹³⁹⁷⁹⁹ is an apocalyptic number.

139799 is a deficient number, since it is larger than the sum of its proper divisors (15721).

139799 is a wasteful number, since it uses less digits than its factorization.

139799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261.

The product of its digits is 15309, while the sum is 38.

The square root of 139799 is about 373.8970446527. The cubic root of 139799 is about 51.9000793234.

The spelling of 139799 in words is "one hundred thirty-nine thousand, seven hundred ninety-nine".