423899278417 has 2 divisors, whose sum is σ = 423899278418. Its totient is φ = 423899278416.

The previous prime is 423899278399. The next prime is 423899278457. The reversal of 423899278417 is 714872998324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 293521234176 + 130378044241 = 541776^2 + 361079^2 .

It is a cyclic number.

It is not a de Polignac number, because 423899278417 - 2¹¹ = 423899276369 is a prime.

It is not a weakly prime, because it can be changed into another prime (423899278457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211949639208 + 211949639209.

It is an arithmetic number, because the mean of its divisors is an integer number (211949639209).

Almost surely, 2^423899278417 is an apocalyptic number.

It is an amenable number.

423899278417 is a deficient number, since it is larger than the sum of its proper divisors (1).

423899278417 is an equidigital number, since it uses as much as digits as its factorization.

423899278417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 64.

The spelling of 423899278417 in words is "four hundred twenty-three billion, eight hundred ninety-nine million, two hundred seventy-eight thousand, four hundred seventeen".