13553819 has 2 divisors, whose sum is σ = 13553820. Its totient is φ = 13553818.

The previous prime is 13553807. The next prime is 13553833. The reversal of 13553819 is 91835531.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13553819 is a prime.

It is a super-2 number, since 2×13553819² = 367412018969522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13558819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6776909 + 6776910.

It is an arithmetic number, because the mean of its divisors is an integer number (6776910).

Almost surely, 2^13553819 is an apocalyptic number.

13553819 is a deficient number, since it is larger than the sum of its proper divisors (1).

13553819 is an equidigital number, since it uses as much as digits as its factorization.

13553819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 35.

The square root of 13553819 is about 3681.5511676466. The cubic root of 13553819 is about 238.4261543138.

The spelling of 13553819 in words is "thirteen million, five hundred fifty-three thousand, eight hundred nineteen".