13098409 has 4 divisors (see below), whose sum is σ = 13112260. Its totient is φ = 13084560.

The previous prime is 13098389. The next prime is 13098439. The reversal of 13098409 is 90489031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9018009 + 4080400 = 3003^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 13098409 - 2¹⁷ = 12967337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13098439) 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, 5394 + ... + 7435.

It is an arithmetic number, because the mean of its divisors is an integer number (3278065).

Almost surely, 2^13098409 is an apocalyptic number.

It is an amenable number.

13098409 is a deficient number, since it is larger than the sum of its proper divisors (13851).

13098409 is a wasteful number, since it uses less digits than its factorization.

13098409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13850.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 13098409 is about 3619.1724192141. The cubic root of 13098409 is about 235.7252920131.

The spelling of 13098409 in words is "thirteen million, ninety-eight thousand, four hundred nine".