138677859 has 16 divisors (see below), whose sum is σ = 206071840. Its totient is φ = 92171520.

The previous prime is 138677809. The next prime is 138677863. The reversal of 138677859 is 958776831.

It is not a de Polignac number, because 138677859 - 2⁷ = 138677731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138677809) 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, 1479 + ... + 16719.

It is an arithmetic number, because the mean of its divisors is an integer number (12879490).

Almost surely, 2^138677859 is an apocalyptic number.

138677859 is a deficient number, since it is larger than the sum of its proper divisors (67393981).

138677859 is a wasteful number, since it uses less digits than its factorization.

138677859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15587 (or 15581 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 138677859 is about 11776.1563763394. The cubic root of 138677859 is about 517.6096638000.

The spelling of 138677859 in words is "one hundred thirty-eight million, six hundred seventy-seven thousand, eight hundred fifty-nine".