13409911 has 4 divisors (see below), whose sum is σ = 13737024. Its totient is φ = 13082800.

The previous prime is 13409909. The next prime is 13409917. The reversal of 13409911 is 11990431.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13409911 - 2¹ = 13409909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13409911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13409917) 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, 163495 + ... + 163576.

It is an arithmetic number, because the mean of its divisors is an integer number (3434256).

Almost surely, 2^13409911 is an apocalyptic number.

13409911 is a deficient number, since it is larger than the sum of its proper divisors (327113).

13409911 is an equidigital number, since it uses as much as digits as its factorization.

13409911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327112.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 13409911 is about 3661.9545327598. The cubic root of 13409911 is about 237.5793182900.

The spelling of 13409911 in words is "thirteen million, four hundred nine thousand, nine hundred eleven".