138340659 has 4 divisors (see below), whose sum is σ = 184454216. Its totient is φ = 92227104.

The previous prime is 138340649. The next prime is 138340667. The reversal of 138340659 is 956043831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 956043831 = 3 ⋅318681277.

It is not a de Polignac number, because 138340659 - 2¹² = 138336563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138340649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23056774 + ... + 23056779.

It is an arithmetic number, because the mean of its divisors is an integer number (46113554).

Almost surely, 2^138340659 is an apocalyptic number.

138340659 is a deficient number, since it is larger than the sum of its proper divisors (46113557).

138340659 is an equidigital number, since it uses as much as digits as its factorization.

138340659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46113556.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 138340659 is about 11761.8305973177. The cubic root of 138340659 is about 517.1897947203.

The spelling of 138340659 in words is "one hundred thirty-eight million, three hundred forty thousand, six hundred fifty-nine".