13493749 has 4 divisors (see below), whose sum is σ = 13715020. Its totient is φ = 13272480.

The previous prime is 13493719. The next prime is 13493759. The reversal of 13493749 is 94739431.

It is a happy number.

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 2537649 + 10956100 = 1593^2 + 3310^2 .

It is a cyclic number.

It is not a de Polignac number, because 13493749 - 2⁹ = 13493237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13493719) 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, 110544 + ... + 110665.

It is an arithmetic number, because the mean of its divisors is an integer number (3428755).

Almost surely, 2^13493749 is an apocalyptic number.

It is an amenable number.

13493749 is a deficient number, since it is larger than the sum of its proper divisors (221271).

13493749 is an equidigital number, since it uses as much as digits as its factorization.

13493749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221270.

The product of its digits is 81648, while the sum is 40.

The square root of 13493749 is about 3673.3838623264. The cubic root of 13493749 is about 238.0734008474.

The spelling of 13493749 in words is "thirteen million, four hundred ninety-three thousand, seven hundred forty-nine".