423428491 has 2 divisors, whose sum is σ = 423428492. Its totient is φ = 423428490.

The previous prime is 423428483. The next prime is 423428513. The reversal of 423428491 is 194824324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423428491 - 2³ = 423428483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423428491.

It is not a weakly prime, because it can be changed into another prime (423828491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211714245 + 211714246.

It is an arithmetic number, because the mean of its divisors is an integer number (211714246).

Almost surely, 2^423428491 is an apocalyptic number.

423428491 is a deficient number, since it is larger than the sum of its proper divisors (1).

423428491 is an equidigital number, since it uses as much as digits as its factorization.

423428491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 37.

The square root of 423428491 is about 20577.3781371680. The cubic root of 423428491 is about 750.9194595907.

The spelling of 423428491 in words is "four hundred twenty-three million, four hundred twenty-eight thousand, four hundred ninety-one".