423946791091 has 2 divisors, whose sum is σ = 423946791092. Its totient is φ = 423946791090.

The previous prime is 423946791067. The next prime is 423946791137. The reversal of 423946791091 is 190197649324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423946791091 - 2²³ = 423938402483 is a prime.

It is not a weakly prime, because it can be changed into another prime (423946791011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211973395545 + 211973395546.

It is an arithmetic number, because the mean of its divisors is an integer number (211973395546).

Almost surely, 2^423946791091 is an apocalyptic number.

423946791091 is a deficient number, since it is larger than the sum of its proper divisors (1).

423946791091 is an equidigital number, since it uses as much as digits as its factorization.

423946791091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 423946791091 in words is "four hundred twenty-three billion, nine hundred forty-six million, seven hundred ninety-one thousand, ninety-one".