13520369 has 4 divisors (see below), whose sum is σ = 13606644. Its totient is φ = 13434096.

The previous prime is 13520363. The next prime is 13520383. The reversal of 13520369 is 96302531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96302531 = 13 ⋅7407887.

It can be written as a sum of positive squares in 2 ways, for example, as 1129969 + 12390400 = 1063^2 + 3520^2 .

It is a cyclic number.

It is not a de Polignac number, because 13520369 - 2¹² = 13516273 is a prime.

It is a super-2 number, since 2×13520369² = 365600755792322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13520363) 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, 42902 + ... + 43215.

It is an arithmetic number, because the mean of its divisors is an integer number (3401661).

Almost surely, 2^13520369 is an apocalyptic number.

It is an amenable number.

13520369 is a deficient number, since it is larger than the sum of its proper divisors (86275).

13520369 is an equidigital number, since it uses as much as digits as its factorization.

13520369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86274.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 13520369 is about 3677.0054392127. The cubic root of 13520369 is about 238.2298523277.

The spelling of 13520369 in words is "thirteen million, five hundred twenty thousand, three hundred sixty-nine".