13649137 has 4 divisors (see below), whose sum is σ = 13658596. Its totient is φ = 13639680.

The previous prime is 13649123. The next prime is 13649159. The reversal of 13649137 is 73194631.

13649137 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8271376 + 5377761 = 2876^2 + 2319^2 .

It is a cyclic number.

It is not a de Polignac number, because 13649137 - 2¹¹ = 13647089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13649107) 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, 2064 + ... + 5617.

It is an arithmetic number, because the mean of its divisors is an integer number (3414649).

Almost surely, 2^13649137 is an apocalyptic number.

It is an amenable number.

13649137 is a deficient number, since it is larger than the sum of its proper divisors (9459).

13649137 is an equidigital number, since it uses as much as digits as its factorization.

13649137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9458.

The product of its digits is 13608, while the sum is 34.

The square root of 13649137 is about 3694.4738461654. The cubic root of 13649137 is about 238.9837643541.

It can be divided in two parts, 1364 and 9137, that added together give a palindrome (10501).

The spelling of 13649137 in words is "thirteen million, six hundred forty-nine thousand, one hundred thirty-seven".