138045579 has 16 divisors (see below), whose sum is σ = 210519552. Its totient is φ = 78821568.

The previous prime is 138045577. The next prime is 138045587. The reversal of 138045579 is 975540831.

It is not a de Polignac number, because 138045579 - 2¹ = 138045577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138045579.

It is not an unprimeable number, because it can be changed into a prime (138045577) 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, 49527 + ... + 52239.

It is an arithmetic number, because the mean of its divisors is an integer number (13157472).

Almost surely, 2^138045579 is an apocalyptic number.

138045579 is a deficient number, since it is larger than the sum of its proper divisors (72473973).

138045579 is a wasteful number, since it uses less digits than its factorization.

138045579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 138045579 is about 11749.2799353833. The cubic root of 138045579 is about 516.8218117965.

The spelling of 138045579 in words is "one hundred thirty-eight million, forty-five thousand, five hundred seventy-nine".