139997159 has 16 divisors (see below), whose sum is σ = 158874048. Its totient is φ = 122614272.

The previous prime is 139997131. The next prime is 139997171. The reversal of 139997159 is 951799931.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139997159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139997159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139997119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9629 + ... + 19305.

It is an arithmetic number, because the mean of its divisors is an integer number (9929628).

Almost surely, 2^139997159 is an apocalyptic number.

139997159 is a deficient number, since it is larger than the sum of its proper divisors (18876889).

139997159 is a wasteful number, since it uses less digits than its factorization.

139997159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9754.

The product of its digits is 688905, while the sum is 53.

The square root of 139997159 is about 11832.0395114283. The cubic root of 139997159 is about 519.2458978100.

The spelling of 139997159 in words is "one hundred thirty-nine million, nine hundred ninety-seven thousand, one hundred fifty-nine".