13221479 has 2 divisors, whose sum is σ = 13221480. Its totient is φ = 13221478.

The previous prime is 13221457. The next prime is 13221491. The reversal of 13221479 is 97412231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13221479 - 2²⁰ = 12172903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610739 + 6610740.

It is an arithmetic number, because the mean of its divisors is an integer number (6610740).

Almost surely, 2^13221479 is an apocalyptic number.

13221479 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221479 is an equidigital number, since it uses as much as digits as its factorization.

13221479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 13221479 is about 3636.1351735050. The cubic root of 13221479 is about 236.4612674898.

The spelling of 13221479 in words is "thirteen million, two hundred twenty-one thousand, four hundred seventy-nine".