235668889 has 2 divisors, whose sum is σ = 235668890. Its totient is φ = 235668888.

The previous prime is 235668863. The next prime is 235668911. The reversal of 235668889 is 988866532.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234334864 + 1334025 = 15308^2 + 1155^2 .

It is a cyclic number.

It is not a de Polignac number, because 235668889 - 2¹¹ = 235666841 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (235668289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117834444 + 117834445.

It is an arithmetic number, because the mean of its divisors is an integer number (117834445).

Almost surely, 2^235668889 is an apocalyptic number.

It is an amenable number.

235668889 is a deficient number, since it is larger than the sum of its proper divisors (1).

235668889 is an equidigital number, since it uses as much as digits as its factorization.

235668889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 55.

The square root of 235668889 is about 15351.5109679797. The cubic root of 235668889 is about 617.6855165520.

It can be divided in two parts, 235 and 668889, that added together give a square (669124 = 818²).

The spelling of 235668889 in words is "two hundred thirty-five million, six hundred sixty-eight thousand, eight hundred eighty-nine".