138808495 has 16 divisors (see below), whose sum is σ = 191361600. Its totient is φ = 94685184.

The previous prime is 138808487. The next prime is 138808499. The reversal of 138808495 is 594808831.

It is a cyclic number.

It is not a de Polignac number, because 138808495 - 2³ = 138808487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138808499) 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, 3520 + ... + 17029.

It is an arithmetic number, because the mean of its divisors is an integer number (11960100).

Almost surely, 2^138808495 is an apocalyptic number.

138808495 is a deficient number, since it is larger than the sum of its proper divisors (52553105).

138808495 is a wasteful number, since it uses less digits than its factorization.

138808495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20754.

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 138808495 is about 11781.7017022160. The cubic root of 138808495 is about 517.7721440382.

The spelling of 138808495 in words is "one hundred thirty-eight million, eight hundred eight thousand, four hundred ninety-five".