423133891 has 2 divisors, whose sum is σ = 423133892. Its totient is φ = 423133890.

The previous prime is 423133853. The next prime is 423133897. The reversal of 423133891 is 198331324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423133891 - 2⁹ = 423133379 is a prime.

It is not a weakly prime, because it can be changed into another prime (423133897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211566945 + 211566946.

It is an arithmetic number, because the mean of its divisors is an integer number (211566946).

Almost surely, 2^423133891 is an apocalyptic number.

423133891 is a deficient number, since it is larger than the sum of its proper divisors (1).

423133891 is an equidigital number, since it uses as much as digits as its factorization.

423133891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 423133891 is about 20570.2185452659. The cubic root of 423133891 is about 750.7452686690.

The spelling of 423133891 in words is "four hundred twenty-three million, one hundred thirty-three thousand, eight hundred ninety-one".