13113949 has 4 divisors (see below), whose sum is σ = 13361436. Its totient is φ = 12866464.

The previous prime is 13113931. The next prime is 13113983. The reversal of 13113949 is 94931131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94931131 = 331 ⋅286801.

It can be written as a sum of positive squares in 2 ways, for example, as 8940100 + 4173849 = 2990^2 + 2043^2 .

It is a cyclic number.

It is not a de Polignac number, because 13113949 - 2²³ = 4725341 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13113949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13113929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123664 + ... + 123769.

It is an arithmetic number, because the mean of its divisors is an integer number (3340359).

Almost surely, 2^13113949 is an apocalyptic number.

It is an amenable number.

13113949 is a deficient number, since it is larger than the sum of its proper divisors (247487).

13113949 is an equidigital number, since it uses as much as digits as its factorization.

13113949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247486.

The product of its digits is 2916, while the sum is 31.

The square root of 13113949 is about 3621.3186824691. The cubic root of 13113949 is about 235.8184769519.

The spelling of 13113949 in words is "thirteen million, one hundred thirteen thousand, nine hundred forty-nine".