13749313 has 4 divisors (see below), whose sum is σ = 14008788. Its totient is φ = 13489840.

The previous prime is 13749299. The next prime is 13749319. The reversal of 13749313 is 31394731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9935104 + 3814209 = 3152^2 + 1953^2 .

It is a cyclic number.

It is not a de Polignac number, because 13749313 - 2¹³ = 13741121 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 not an unprimeable number, because it can be changed into a prime (13749319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129658 + ... + 129763.

It is an arithmetic number, because the mean of its divisors is an integer number (3502197).

Almost surely, 2^13749313 is an apocalyptic number.

It is an amenable number.

13749313 is a deficient number, since it is larger than the sum of its proper divisors (259475).

13749313 is an equidigital number, since it uses as much as digits as its factorization.

13749313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259474.

The product of its digits is 6804, while the sum is 31.

The square root of 13749313 is about 3708.0066073296. The cubic root of 13749313 is about 239.5670028407.

The spelling of 13749313 in words is "thirteen million, seven hundred forty-nine thousand, three hundred thirteen".