13673221 has 2 divisors, whose sum is σ = 13673222. Its totient is φ = 13673220.

The previous prime is 13673207. The next prime is 13673237. The reversal of 13673221 is 12237631.

13673221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13616100 + 57121 = 3690^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 13673221 - 2⁵ = 13673189 is a prime.

It is equal to p₈₉₀₂₂₄ and since 13673221 and 890224 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13673021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6836610 + 6836611.

It is an arithmetic number, because the mean of its divisors is an integer number (6836611).

Almost surely, 2^13673221 is an apocalyptic number.

It is an amenable number.

13673221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13673221 is an equidigital number, since it uses as much as digits as its factorization.

13673221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 13673221 is about 3697.7318723780. The cubic root of 13673221 is about 239.1242446149.

The spelling of 13673221 in words is "thirteen million, six hundred seventy-three thousand, two hundred twenty-one".