13499139 has 16 divisors (see below), whose sum is σ = 20062080. Its totient is φ = 8023680.

The previous prime is 13499131. The next prime is 13499149. The reversal of 13499139 is 93199431.

It is not a de Polignac number, because 13499139 - 2³ = 13499131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13499097 and 13499106.

It is not an unprimeable number, because it can be changed into a prime (13499131) 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, 5997 + ... + 7934.

It is an arithmetic number, because the mean of its divisors is an integer number (1253880).

Almost surely, 2^13499139 is an apocalyptic number.

13499139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13499139 is a deficient number, since it is larger than the sum of its proper divisors (6562941).

13499139 is a wasteful number, since it uses less digits than its factorization.

13499139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13970.

The product of its digits is 26244, while the sum is 39.

The square root of 13499139 is about 3674.1174450472. The cubic root of 13499139 is about 238.1050956420.

The spelling of 13499139 in words is "thirteen million, four hundred ninety-nine thousand, one hundred thirty-nine".