423613945109 has 2 divisors, whose sum is σ = 423613945110. Its totient is φ = 423613945108.

The previous prime is 423613945037. The next prime is 423613945127. The reversal of 423613945109 is 901549316324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230275216900 + 193338728209 = 479870^2 + 439703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423613945109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423613945159) 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, 211806972554 + 211806972555.

It is an arithmetic number, because the mean of its divisors is an integer number (211806972555).

Almost surely, 2^423613945109 is an apocalyptic number.

It is an amenable number.

423613945109 is a deficient number, since it is larger than the sum of its proper divisors (1).

423613945109 is an equidigital number, since it uses as much as digits as its factorization.

423613945109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 423613945109 in words is "four hundred twenty-three billion, six hundred thirteen million, nine hundred forty-five thousand, one hundred nine".