423234491 has 2 divisors, whose sum is σ = 423234492. Its totient is φ = 423234490.

The previous prime is 423234451. The next prime is 423234563. The reversal of 423234491 is 194432324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423234491 - 2²² = 419040187 is a prime.

It is a Chen prime.

It is equal to p_22507448 and since 423234491 and 22507448 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (423234421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211617245 + 211617246.

It is an arithmetic number, because the mean of its divisors is an integer number (211617246).

Almost surely, 2^423234491 is an apocalyptic number.

423234491 is a deficient number, since it is larger than the sum of its proper divisors (1).

423234491 is an equidigital number, since it uses as much as digits as its factorization.

423234491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 32.

The square root of 423234491 is about 20572.6636826639. The cubic root of 423234491 is about 750.8047604682.

The spelling of 423234491 in words is "four hundred twenty-three million, two hundred thirty-four thousand, four hundred ninety-one".