13553447 has 2 divisors, whose sum is σ = 13553448. Its totient is φ = 13553446.

The previous prime is 13553431. The next prime is 13553453. The reversal of 13553447 is 74435531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13553447 - 2⁴ = 13553431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13553467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6776723 + 6776724.

It is an arithmetic number, because the mean of its divisors is an integer number (6776724).

Almost surely, 2^13553447 is an apocalyptic number.

13553447 is a deficient number, since it is larger than the sum of its proper divisors (1).

13553447 is an equidigital number, since it uses as much as digits as its factorization.

13553447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 32.

The square root of 13553447 is about 3681.5006451174. The cubic root of 13553447 is about 238.4239730014.

Adding to 13553447 its reverse (74435531), we get a palindrome (87988978).

The spelling of 13553447 in words is "thirteen million, five hundred fifty-three thousand, four hundred forty-seven".