139879893 has 16 divisors (see below), whose sum is σ = 200719296. Its totient is φ = 86327040.

The previous prime is 139879837. The next prime is 139879913. The reversal of 139879893 is 398978931.

139879893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139879893 - 2⁹ = 139879381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139879393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19371 + ... + 25592.

It is an arithmetic number, because the mean of its divisors is an integer number (12544956).

Almost surely, 2^139879893 is an apocalyptic number.

It is an amenable number.

139879893 is a deficient number, since it is larger than the sum of its proper divisors (60839403).

139879893 is a wasteful number, since it uses less digits than its factorization.

139879893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45044.

The product of its digits is 2939328, while the sum is 57.

The square root of 139879893 is about 11827.0830300628. The cubic root of 139879893 is about 519.1008784422.

The spelling of 139879893 in words is "one hundred thirty-nine million, eight hundred seventy-nine thousand, eight hundred ninety-three".