138998159 has 16 divisors (see below), whose sum is σ = 148811040. Its totient is φ = 129623040.

The previous prime is 138998113. The next prime is 138998161. The reversal of 138998159 is 951899831.

It is a cyclic number.

It is not a de Polignac number, because 138998159 - 2¹⁶ = 138932623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138998159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138998179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88727 + ... + 90279.

It is an arithmetic number, because the mean of its divisors is an integer number (9300690).

Almost surely, 2^138998159 is an apocalyptic number.

138998159 is a deficient number, since it is larger than the sum of its proper divisors (9812881).

138998159 is a wasteful number, since it uses less digits than its factorization.

138998159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690.

The product of its digits is 699840, while the sum is 53.

The square root of 138998159 is about 11789.7480465021. The cubic root of 138998159 is about 518.0078597815.

The spelling of 138998159 in words is "one hundred thirty-eight million, nine hundred ninety-eight thousand, one hundred fifty-nine".