13809494 has 4 divisors (see below), whose sum is σ = 20714244. Its totient is φ = 6904746.

The previous prime is 13809487. The next prime is 13809517. The reversal of 13809494 is 49490831.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3452372 + ... + 3452375.

It is an arithmetic number, because the mean of its divisors is an integer number (5178561).

Almost surely, 2^13809494 is an apocalyptic number.

13809494 is a deficient number, since it is larger than the sum of its proper divisors (6904750).

13809494 is an equidigital number, since it uses as much as digits as its factorization.

13809494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6904749.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 13809494 is about 3716.1127539406. The cubic root of 13809494 is about 239.9160238609.

The spelling of 13809494 in words is "thirteen million, eight hundred nine thousand, four hundred ninety-four".