13139949 has 16 divisors (see below), whose sum is σ = 18123840. Its totient is φ = 8463360.

The previous prime is 13139947. The next prime is 13139989. The reversal of 13139949 is 94993131.

It is not a de Polignac number, because 13139949 - 2¹ = 13139947 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13139941) 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, 10189 + ... + 11405.

It is an arithmetic number, because the mean of its divisors is an integer number (1132740).

Almost surely, 2^13139949 is an apocalyptic number.

It is an amenable number.

13139949 is a deficient number, since it is larger than the sum of its proper divisors (4983891).

13139949 is a wasteful number, since it uses less digits than its factorization.

13139949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340.

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

The square root of 13139949 is about 3624.9067574215. The cubic root of 13139949 is about 235.9742203479.

The spelling of 13139949 in words is "thirteen million, one hundred thirty-nine thousand, nine hundred forty-nine".