13555799 has 2 divisors, whose sum is σ = 13555800. Its totient is φ = 13555798.

The previous prime is 13555777. The next prime is 13555807. The reversal of 13555799 is 99755531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13555799 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13555769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6777899 + 6777900.

It is an arithmetic number, because the mean of its divisors is an integer number (6777900).

Almost surely, 2^13555799 is an apocalyptic number.

13555799 is a deficient number, since it is larger than the sum of its proper divisors (1).

13555799 is an equidigital number, since it uses as much as digits as its factorization.

13555799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 212625, while the sum is 44.

The square root of 13555799 is about 3681.8200662173. The cubic root of 13555799 is about 238.4377638535.

The spelling of 13555799 in words is "thirteen million, five hundred fifty-five thousand, seven hundred ninety-nine".