13609243 has 2 divisors, whose sum is σ = 13609244. Its totient is φ = 13609242.

The previous prime is 13609237. The next prime is 13609247. The reversal of 13609243 is 34290631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13609243 - 2¹³ = 13601051 is a prime.

It is a super-2 number, since 2×13609243² = 370422990066098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13609247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6804621 + 6804622.

It is an arithmetic number, because the mean of its divisors is an integer number (6804622).

Almost surely, 2^13609243 is an apocalyptic number.

13609243 is a deficient number, since it is larger than the sum of its proper divisors (1).

13609243 is an equidigital number, since it uses as much as digits as its factorization.

13609243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 13609243 is about 3689.0707502025. The cubic root of 13609243 is about 238.7507014590.

Adding to 13609243 its reverse (34290631), we get a palindrome (47899874).

The spelling of 13609243 in words is "thirteen million, six hundred nine thousand, two hundred forty-three".