13813009 has 4 divisors (see below), whose sum is σ = 15786304. Its totient is φ = 11839716.

The previous prime is 13812991. The next prime is 13813013. The reversal of 13813009 is 90031831.

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.

It is not a de Polignac number, because 13813009 - 2⁵ = 13812977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13813039) 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, 986637 + ... + 986650.

It is an arithmetic number, because the mean of its divisors is an integer number (3946576).

Almost surely, 2^13813009 is an apocalyptic number.

It is an amenable number.

13813009 is a deficient number, since it is larger than the sum of its proper divisors (1973295).

13813009 is an equidigital number, since it uses as much as digits as its factorization.

13813009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973294.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 13813009 is about 3716.5856642892. The cubic root of 13813009 is about 239.9363778117.

The spelling of 13813009 in words is "thirteen million, eight hundred thirteen thousand, nine".