139368805 has 24 divisors (see below), whose sum is σ = 181871712. Its totient is φ = 102450432.

The previous prime is 139368773. The next prime is 139368821. The reversal of 139368805 is 508863931.

It is not a de Polignac number, because 139368805 - 2⁵ = 139368773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 61014 + ... + 63256.

It is an arithmetic number, because the mean of its divisors is an integer number (7577988).

Almost surely, 2^139368805 is an apocalyptic number.

It is an amenable number.

139368805 is a deficient number, since it is larger than the sum of its proper divisors (42502907).

139368805 is a wasteful number, since it uses less digits than its factorization.

139368805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325 (or 2308 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 139368805 is about 11805.4565773629. The cubic root of 139368805 is about 518.4678829878.

The spelling of 139368805 in words is "one hundred thirty-nine million, three hundred sixty-eight thousand, eight hundred five".