138447659 has 16 divisors (see below), whose sum is σ = 162488832. Its totient is φ = 115492608.

The previous prime is 138447641. The next prime is 138447697. The reversal of 138447659 is 956744831.

It is a de Polignac number, because none of the positive numbers 2^k-138447659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138447619) 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, 105602 + ... + 106904.

It is an arithmetic number, because the mean of its divisors is an integer number (10155552).

Almost surely, 2^138447659 is an apocalyptic number.

138447659 is a deficient number, since it is larger than the sum of its proper divisors (24041173).

138447659 is a wasteful number, since it uses less digits than its factorization.

138447659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706.

The product of its digits is 725760, while the sum is 47.

The square root of 138447659 is about 11766.3783298006. The cubic root of 138447659 is about 517.3231010264.

The spelling of 138447659 in words is "one hundred thirty-eight million, four hundred forty-seven thousand, six hundred fifty-nine".