423042091 has 2 divisors, whose sum is σ = 423042092. Its totient is φ = 423042090.

The previous prime is 423042079. The next prime is 423042121. The reversal of 423042091 is 190240324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423042091 - 2²³ = 414653483 is a prime.

It is a super-2 number, since 2×423042091² = 357929221515304562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423042031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211521045 + 211521046.

It is an arithmetic number, because the mean of its divisors is an integer number (211521046).

Almost surely, 2^423042091 is an apocalyptic number.

423042091 is a deficient number, since it is larger than the sum of its proper divisors (1).

423042091 is an equidigital number, since it uses as much as digits as its factorization.

423042091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 423042091 is about 20567.9870429753. The cubic root of 423042091 is about 750.6909726950.

The spelling of 423042091 in words is "four hundred twenty-three million, forty-two thousand, ninety-one".