13309999 has 4 divisors (see below), whose sum is σ = 13478560. Its totient is φ = 13141440.

The previous prime is 13309991. The next prime is 13310009. The reversal of 13309999 is 99990331.

13309999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13309999 - 2³ = 13309991 is a prime.

It is a Duffinian number.

13309999 is a modest number, since divided by 9999 gives 1330 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13309991) 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, 84162 + ... + 84319.

It is an arithmetic number, because the mean of its divisors is an integer number (3369640).

Almost surely, 2^13309999 is an apocalyptic number.

13309999 is a deficient number, since it is larger than the sum of its proper divisors (168561).

13309999 is an equidigital number, since it uses as much as digits as its factorization.

13309999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168560.

The product of its (nonzero) digits is 59049, while the sum is 43.

The square root of 13309999 is about 3648.2871323403. The cubic root of 13309999 is about 236.9878099684.

The spelling of 13309999 in words is "thirteen million, three hundred nine thousand, nine hundred ninety-nine".