104668021 has 2 divisors, whose sum is σ = 104668022. Its totient is φ = 104668020.

The previous prime is 104668019. The next prime is 104668037. The reversal of 104668021 is 120866401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104325796 + 342225 = 10214^2 + 585^2 .

It is a cyclic number.

It is not a de Polignac number, because 104668021 - 2¹ = 104668019 is a prime.

Together with 104668019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104668621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52334010 + 52334011.

It is an arithmetic number, because the mean of its divisors is an integer number (52334011).

Almost surely, 2^104668021 is an apocalyptic number.

It is an amenable number.

104668021 is a deficient number, since it is larger than the sum of its proper divisors (1).

104668021 is an equidigital number, since it uses as much as digits as its factorization.

104668021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 104668021 is about 10230.7390251145. The cubic root of 104668021 is about 471.2716745936.

The spelling of 104668021 in words is "one hundred four million, six hundred sixty-eight thousand, twenty-one".