402104242489 has 2 divisors, whose sum is σ = 402104242490. Its totient is φ = 402104242488.

The previous prime is 402104242487. The next prime is 402104242511. The reversal of 402104242489 is 984242401204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 347873476864 + 54230765625 = 589808^2 + 232875^2 .

It is a cyclic number.

It is not a de Polignac number, because 402104242489 - 2¹ = 402104242487 is a prime.

Together with 402104242487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (402104242487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201052121244 + 201052121245.

It is an arithmetic number, because the mean of its divisors is an integer number (201052121245).

Almost surely, 2^402104242489 is an apocalyptic number.

It is an amenable number.

402104242489 is a deficient number, since it is larger than the sum of its proper divisors (1).

402104242489 is an equidigital number, since it uses as much as digits as its factorization.

402104242489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 402104242489 in words is "four hundred two billion, one hundred four million, two hundred forty-two thousand, four hundred eighty-nine".