402104241989 has 2 divisors, whose sum is σ = 402104241990.
Its totient is φ = 402104241988.
The previous prime is 402104241977. The next prime is 402104242063. The reversal of 402104241989 is 989142401204.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 395693837764 + 6410404225 = 629042^2 + 80065^2
It is a cyclic number.
It is not a de Polignac number, because 402104241989 - 212 = 402104237893 is a prime.
It is a super-2 number, since 2×4021042419892 (a number of 24 digits) contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (402104241919) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201052120994 + 201052120995.
It is an arithmetic number, because the mean of its divisors is an integer number (201052120995).
Almost surely, 2402104241989 is an apocalyptic number.
It is an amenable number.
402104241989 is a deficient number, since it is larger than the sum of its proper divisors (1).
402104241989 is an equidigital number, since it uses as much as digits as its factorization.
402104241989 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 165888, while the sum is 44.
The spelling of 402104241989 in words is "four hundred two billion, one hundred four million, two hundred forty-one thousand, nine hundred eighty-nine".