139505195 has 4 divisors (see below), whose sum is σ = 167406240. Its totient is φ = 111604152.

The previous prime is 139505183. The next prime is 139505237. The reversal of 139505195 is 591505931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 591505931 = 227 ⋅2605753.

It is a cyclic number.

It is not a de Polignac number, because 139505195 - 2²² = 135310891 is a prime.

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, 13950515 + ... + 13950524.

It is an arithmetic number, because the mean of its divisors is an integer number (41851560).

Almost surely, 2^139505195 is an apocalyptic number.

139505195 is a deficient number, since it is larger than the sum of its proper divisors (27901045).

139505195 is an equidigital number, since it uses as much as digits as its factorization.

139505195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27901044.

The product of its (nonzero) digits is 30375, while the sum is 38.

The square root of 139505195 is about 11811.2317308569. The cubic root of 139505195 is about 518.6369566425.

The spelling of 139505195 in words is "one hundred thirty-nine million, five hundred five thousand, one hundred ninety-five".