139142913 has 16 divisors (see below), whose sum is σ = 228337536. Its totient is φ = 73393920.

The previous prime is 139142881. The next prime is 139142921. The reversal of 139142913 is 319241931.

It is a happy number.

It is not a de Polignac number, because 139142913 - 2⁵ = 139142881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139142963) 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, 254568 + ... + 255113.

It is an arithmetic number, because the mean of its divisors is an integer number (14271096).

Almost surely, 2^139142913 is an apocalyptic number.

139142913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

139142913 is a deficient number, since it is larger than the sum of its proper divisors (89194623).

139142913 is a wasteful number, since it uses less digits than its factorization.

139142913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509704.

The product of its digits is 5832, while the sum is 33.

The square root of 139142913 is about 11795.8854267071. The cubic root of 139142913 is about 518.1876168270.

The spelling of 139142913 in words is "one hundred thirty-nine million, one hundred forty-two thousand, nine hundred thirteen".