138507995 has 8 divisors (see below), whose sum is σ = 166336800. Its totient is φ = 110721600.

The previous prime is 138507989. The next prime is 138508009. The reversal of 138507995 is 599705831.

138507995 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138507995 - 2⁶ = 138507931 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2906 + ... + 16895.

It is an arithmetic number, because the mean of its divisors is an integer number (20792100).

Almost surely, 2^138507995 is an apocalyptic number.

138507995 is a deficient number, since it is larger than the sum of its proper divisors (27828805).

138507995 is a wasteful number, since it uses less digits than its factorization.

138507995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21205.

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 138507995 is about 11768.9419660393. The cubic root of 138507995 is about 517.3982405501.

The spelling of 138507995 in words is "one hundred thirty-eight million, five hundred seven thousand, nine hundred ninety-five".