13673809 has 2 divisors, whose sum is σ = 13673810. Its totient is φ = 13673808.

The previous prime is 13673783. The next prime is 13673813. The reversal of 13673809 is 90837631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 3814209 = 3140^2 + 1953^2 .

It is a cyclic number.

It is not a de Polignac number, because 13673809 - 2¹⁵ = 13641041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13673509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6836904 + 6836905.

It is an arithmetic number, because the mean of its divisors is an integer number (6836905).

Almost surely, 2^13673809 is an apocalyptic number.

It is an amenable number.

13673809 is a deficient number, since it is larger than the sum of its proper divisors (1).

13673809 is an equidigital number, since it uses as much as digits as its factorization.

13673809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 13673809 is about 3697.8113797218. The cubic root of 13673809 is about 239.1276723135.

The spelling of 13673809 in words is "thirteen million, six hundred seventy-three thousand, eight hundred nine".