13402009 has 2 divisors, whose sum is σ = 13402010. Its totient is φ = 13402008.

The previous prime is 13402007. The next prime is 13402033. The reversal of 13402009 is 90020431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13344409 + 57600 = 3653^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 13402009 - 2¹ = 13402007 is a prime.

It is a super-2 number, since 2×13402009² = 359227690472162, which contains 22 as substring.

Together with 13402007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13402007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6701004 + 6701005.

It is an arithmetic number, because the mean of its divisors is an integer number (6701005).

Almost surely, 2^13402009 is an apocalyptic number.

It is an amenable number.

13402009 is a deficient number, since it is larger than the sum of its proper divisors (1).

13402009 is an equidigital number, since it uses as much as digits as its factorization.

13402009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 13402009 is about 3660.8754417489. The cubic root of 13402009 is about 237.5326433432.

The spelling of 13402009 in words is "thirteen million, four hundred two thousand, nine".