139476845 has 4 divisors (see below), whose sum is σ = 167372220. Its totient is φ = 111581472.

The previous prime is 139476839. The next prime is 139476847. The reversal of 139476845 is 548674931.

139476845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21058921 + 118417924 = 4589^2 + 10882^2 .

It is a cyclic number.

It is not a de Polignac number, because 139476845 - 2¹⁰ = 139475821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139476845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139476847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13947680 + ... + 13947689.

It is an arithmetic number, because the mean of its divisors is an integer number (41843055).

Almost surely, 2^139476845 is an apocalyptic number.

It is an amenable number.

139476845 is a deficient number, since it is larger than the sum of its proper divisors (27895375).

139476845 is an equidigital number, since it uses as much as digits as its factorization.

139476845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27895374.

The product of its digits is 725760, while the sum is 47.

The square root of 139476845 is about 11810.0315410248. The cubic root of 139476845 is about 518.6018220994.

The spelling of 139476845 in words is "one hundred thirty-nine million, four hundred seventy-six thousand, eight hundred forty-five".