13668881 has 2 divisors, whose sum is σ = 13668882. Its totient is φ = 13668880.

The previous prime is 13668857. The next prime is 13668911. The reversal of 13668881 is 18886631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11937025 + 1731856 = 3455^2 + 1316^2 .

It is a cyclic number.

It is not a de Polignac number, because 13668881 - 2¹⁴ = 13652497 is a prime.

It is a super-2 number, since 2×13668881² = 373676615584322, which contains 22 as substring.

It is equal to p₈₈₉₉₄₃ and since 13668881 and 889943 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13668841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6834440 + 6834441.

It is an arithmetic number, because the mean of its divisors is an integer number (6834441).

Almost surely, 2^13668881 is an apocalyptic number.

It is an amenable number.

13668881 is a deficient number, since it is larger than the sum of its proper divisors (1).

13668881 is an equidigital number, since it uses as much as digits as its factorization.

13668881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 41.

The square root of 13668881 is about 3697.1449795755. The cubic root of 13668881 is about 239.0989418950.

The spelling of 13668881 in words is "thirteen million, six hundred sixty-eight thousand, eight hundred eighty-one".