138883895 has 4 divisors (see below), whose sum is σ = 166660680. Its totient is φ = 111107112.

The previous prime is 138883889. The next prime is 138883907. The reversal of 138883895 is 598388831.

138883895 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138883895 - 2⁴ = 138883879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13888385 + ... + 13888394.

It is an arithmetic number, because the mean of its divisors is an integer number (41665170).

Almost surely, 2^138883895 is an apocalyptic number.

138883895 is a deficient number, since it is larger than the sum of its proper divisors (27776785).

138883895 is an equidigital number, since it uses as much as digits as its factorization.

138883895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27776784.

The product of its digits is 1658880, while the sum is 53.

The square root of 138883895 is about 11784.9011451094. The cubic root of 138883895 is about 517.8658773817.

The spelling of 138883895 in words is "one hundred thirty-eight million, eight hundred eighty-three thousand, eight hundred ninety-five".