139311405 has 12 divisors (see below), whose sum is σ = 241473180. Its totient is φ = 74299392.

The previous prime is 139311353. The next prime is 139311451. The reversal of 139311405 is 504113931.

139311405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 76632516 + 62678889 = 8754^2 + 7917^2 .

It is not a de Polignac number, because 139311405 - 2⁹ = 139310893 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1547860 + ... + 1547949.

It is an arithmetic number, because the mean of its divisors is an integer number (20122765).

Almost surely, 2^139311405 is an apocalyptic number.

139311405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139311405 is a deficient number, since it is larger than the sum of its proper divisors (102161775).

139311405 is a wasteful number, since it uses less digits than its factorization.

139311405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095820 (or 3095817 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 139311405 is about 11803.0252477913. The cubic root of 139311405 is about 518.3966950271.

The spelling of 139311405 in words is "one hundred thirty-nine million, three hundred eleven thousand, four hundred five".