139513 has 6 divisors (see below), whose sum is σ = 153482. Its totient is φ = 126720.

The previous prime is 139511. The next prime is 139537. The reversal of 139513 is 315931.

It can be written as a sum of positive squares in only one way, i.e., 131769 + 7744 = 363^2 + 88^2 .

It is not a de Polignac number, because 139513 - 2¹ = 139511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 456 + ... + 697.

2¹³⁹⁵¹³ is an apocalyptic number.

It is an amenable number.

139513 is a deficient number, since it is larger than the sum of its proper divisors (13969).

139513 is a wasteful number, since it uses less digits than its factorization.

139513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175 (or 1164 counting only the distinct ones).

The product of its digits is 405, while the sum is 22.

The square root of 139513 is about 373.5143906197. The cubic root of 139513 is about 51.8646628650.

The spelling of 139513 in words is "one hundred thirty-nine thousand, five hundred thirteen".