138177693 has 12 divisors (see below), whose sum is σ = 201529120. Its totient is φ = 91223496.

The previous prime is 138177691. The next prime is 138177701. The reversal of 138177693 is 396771831.

138177693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138177693 - 2¹ = 138177691 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138177691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73603 + ... + 75456.

Almost surely, 2^138177693 is an apocalyptic number.

It is an amenable number.

138177693 is a deficient number, since it is larger than the sum of its proper divisors (63351427).

138177693 is a wasteful number, since it uses less digits than its factorization.

138177693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149168 (or 149165 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 138177693 is about 11754.9008077482. The cubic root of 138177693 is about 516.9866308537.

The spelling of 138177693 in words is "one hundred thirty-eight million, one hundred seventy-seven thousand, six hundred ninety-three".