401217190489 has 2 divisors, whose sum is σ = 401217190490. Its totient is φ = 401217190488.

The previous prime is 401217190421. The next prime is 401217190639. The reversal of 401217190489 is 984091712104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259534208025 + 141682982464 = 509445^2 + 376408^2 .

It is a cyclic number.

It is not a de Polignac number, because 401217190489 - 2⁹ = 401217189977 is a prime.

It is not a weakly prime, because it can be changed into another prime (401217170489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200608595244 + 200608595245.

It is an arithmetic number, because the mean of its divisors is an integer number (200608595245).

Almost surely, 2^401217190489 is an apocalyptic number.

It is an amenable number.

401217190489 is a deficient number, since it is larger than the sum of its proper divisors (1).

401217190489 is an equidigital number, since it uses as much as digits as its factorization.

401217190489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 401217190489 in words is "four hundred one billion, two hundred seventeen million, one hundred ninety thousand, four hundred eighty-nine".