139475905 has 32 divisors (see below), whose sum is σ = 181958400. Its totient is φ = 102254592.

The previous prime is 139475863. The next prime is 139475929. The reversal of 139475905 is 509574931.

It is not a de Polignac number, because 139475905 - 2⁹ = 139475393 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 779106 + ... + 779284.

It is an arithmetic number, because the mean of its divisors is an integer number (5686200).

Almost surely, 2^139475905 is an apocalyptic number.

It is an amenable number.

139475905 is a deficient number, since it is larger than the sum of its proper divisors (42482495).

139475905 is a wasteful number, since it uses less digits than its factorization.

139475905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 139475905 is about 11809.9917442816. The cubic root of 139475905 is about 518.6006570630.

The spelling of 139475905 in words is "one hundred thirty-nine million, four hundred seventy-five thousand, nine hundred five".