139505107 has 6 divisors (see below), whose sum is σ = 162281508. Its totient is φ = 119575764.

The previous prime is 139505101. The next prime is 139505123. The reversal of 139505107 is 701505931.

It is not a de Polignac number, because 139505107 - 2³ = 139505099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139505101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1423473 + ... + 1423570.

It is an arithmetic number, because the mean of its divisors is an integer number (27046918).

Almost surely, 2^139505107 is an apocalyptic number.

139505107 is a deficient number, since it is larger than the sum of its proper divisors (22776401).

139505107 is an equidigital number, since it uses as much as digits as its factorization.

139505107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847057 (or 2847050 counting only the distinct ones).

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 139505107 is about 11811.2280055886. The cubic root of 139505107 is about 518.6368475902.

The spelling of 139505107 in words is "one hundred thirty-nine million, five hundred five thousand, one hundred seven".