13555669 has 2 divisors, whose sum is σ = 13555670. Its totient is φ = 13555668.

The previous prime is 13555657. The next prime is 13555699. The reversal of 13555669 is 96655531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8439025 + 5116644 = 2905^2 + 2262^2 .

It is a cyclic number.

It is not a de Polignac number, because 13555669 - 2⁷ = 13555541 is a prime.

It is a super-2 number, since 2×13555669² = 367512324075122, which contains 22 as substring.

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 (13555639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6777834 + 6777835.

It is an arithmetic number, because the mean of its divisors is an integer number (6777835).

Almost surely, 2^13555669 is an apocalyptic number.

It is an amenable number.

13555669 is a deficient number, since it is larger than the sum of its proper divisors (1).

13555669 is an equidigital number, since it uses as much as digits as its factorization.

13555669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121500, while the sum is 40.

The square root of 13555669 is about 3681.8024118630. The cubic root of 13555669 is about 238.4370016457.

The spelling of 13555669 in words is "thirteen million, five hundred fifty-five thousand, six hundred sixty-nine".