13420609 has 4 divisors (see below), whose sum is σ = 13428016. Its totient is φ = 13413204.

The previous prime is 13420597. The next prime is 13420619. The reversal of 13420609 is 90602431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90602431 = 19 ⋅4768549.

It is a cyclic number.

It is not a de Polignac number, because 13420609 - 2⁷ = 13420481 is a prime.

It is a super-2 number, since 2×13420609² = 360225491861762, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13420619) 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, 1042 + ... + 5284.

It is an arithmetic number, because the mean of its divisors is an integer number (3357004).

Almost surely, 2^13420609 is an apocalyptic number.

It is an amenable number.

13420609 is a deficient number, since it is larger than the sum of its proper divisors (7407).

13420609 is an equidigital number, since it uses as much as digits as its factorization.

13420609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7406.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 13420609 is about 3663.4149369134. The cubic root of 13420609 is about 237.6424792354.

The spelling of 13420609 in words is "thirteen million, four hundred twenty thousand, six hundred nine".