138904595 has 8 divisors (see below), whose sum is σ = 166884720. Its totient is φ = 110990880.

The previous prime is 138904589. The next prime is 138904621. The reversal of 138904595 is 595409831.

It is a happy number.

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

It is not a de Polignac number, because 138904595 - 2⁶ = 138904531 is a prime.

It is a super-2 number, since 2×138904595² = 38588973024228050, which contains 22 as substring.

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, 11876 + ... + 20465.

It is an arithmetic number, because the mean of its divisors is an integer number (20860590).

Almost surely, 2^138904595 is an apocalyptic number.

138904595 is a deficient number, since it is larger than the sum of its proper divisors (27980125).

138904595 is an equidigital number, since it uses as much as digits as its factorization.

138904595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33205.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 138904595 is about 11785.7793547987. The cubic root of 138904595 is about 517.8916046054.

The spelling of 138904595 in words is "one hundred thirty-eight million, nine hundred four thousand, five hundred ninety-five".