13655819 has 2 divisors, whose sum is σ = 13655820. Its totient is φ = 13655818.

The previous prime is 13655809. The next prime is 13655827. The reversal of 13655819 is 91855631.

13655819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13655819 is a prime.

It is a super-2 number, since 2×13655819² = 372962785121522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13655809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6827909 + 6827910.

It is an arithmetic number, because the mean of its divisors is an integer number (6827910).

Almost surely, 2^13655819 is an apocalyptic number.

13655819 is a deficient number, since it is larger than the sum of its proper divisors (1).

13655819 is an equidigital number, since it uses as much as digits as its factorization.

13655819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 13655819 is about 3695.3780591436. The cubic root of 13655819 is about 239.0227565384.

It can be divided in two parts, 136 and 55819, that added together give a palindrome (55955).

The spelling of 13655819 in words is "thirteen million, six hundred fifty-five thousand, eight hundred nineteen".