13398609 has 32 divisors (see below), whose sum is σ = 21600000. Its totient is φ = 7375872.

The previous prime is 13398599. The next prime is 13398611. The reversal of 13398609 is 90689331.

It is not a de Polignac number, because 13398609 - 2¹³ = 13390417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13398659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29617 + ... + 30065.

It is an arithmetic number, because the mean of its divisors is an integer number (675000).

Almost surely, 2^13398609 is an apocalyptic number.

It is an amenable number.

13398609 is a deficient number, since it is larger than the sum of its proper divisors (8201391).

13398609 is an equidigital number, since it uses as much as digits as its factorization.

13398609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 13398609 is about 3660.4110424924. The cubic root of 13398609 is about 237.5125548303.

The spelling of 13398609 in words is "thirteen million, three hundred ninety-eight thousand, six hundred nine".