423066491 has 2 divisors, whose sum is σ = 423066492. Its totient is φ = 423066490.

The previous prime is 423066443. The next prime is 423066499. The reversal of 423066491 is 194660324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423066491 - 2²² = 418872187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (423066499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211533245 + 211533246.

It is an arithmetic number, because the mean of its divisors is an integer number (211533246).

Almost surely, 2^423066491 is an apocalyptic number.

423066491 is a deficient number, since it is larger than the sum of its proper divisors (1).

423066491 is an equidigital number, since it uses as much as digits as its factorization.

423066491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 423066491 is about 20568.5801892109. The cubic root of 423066491 is about 750.7054050710.

The spelling of 423066491 in words is "four hundred twenty-three million, sixty-six thousand, four hundred ninety-one".