423899278331 has 2 divisors, whose sum is σ = 423899278332. Its totient is φ = 423899278330.

The previous prime is 423899278321. The next prime is 423899278381. The reversal of 423899278331 is 133872998324.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423899278331 is a prime.

It is a super-2 number, since 2×423899278331² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423899278321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211949639165 + 211949639166.

It is an arithmetic number, because the mean of its divisors is an integer number (211949639166).

Almost surely, 2^423899278331 is an apocalyptic number.

423899278331 is a deficient number, since it is larger than the sum of its proper divisors (1).

423899278331 is an equidigital number, since it uses as much as digits as its factorization.

423899278331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 59.

The spelling of 423899278331 in words is "four hundred twenty-three billion, eight hundred ninety-nine million, two hundred seventy-eight thousand, three hundred thirty-one".