138917763 has 6 divisors (see below), whose sum is σ = 200659004. Its totient is φ = 92611836.

The previous prime is 138917749. The next prime is 138917767. The reversal of 138917763 is 367719831.

138917763 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 138917763 - 2⁴ = 138917747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138917767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7717645 + ... + 7717662.

Almost surely, 2^138917763 is an apocalyptic number.

138917763 is a deficient number, since it is larger than the sum of its proper divisors (61741241).

138917763 is a wasteful number, since it uses less digits than its factorization.

138917763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15435313 (or 15435310 counting only the distinct ones).

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

The square root of 138917763 is about 11786.3379808998. The cubic root of 138917763 is about 517.9079692697.

The spelling of 138917763 in words is "one hundred thirty-eight million, nine hundred seventeen thousand, seven hundred sixty-three".