423663913 has 2 divisors, whose sum is σ = 423663914. Its totient is φ = 423663912.

The previous prime is 423663853. The next prime is 423663937. The reversal of 423663913 is 319366324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238486249 + 185177664 = 15443^2 + 13608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423663913 is a prime.

It is a super-2 number, since 2×423663913² = 358982222356943138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423663943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211831956 + 211831957.

It is an arithmetic number, because the mean of its divisors is an integer number (211831957).

Almost surely, 2^423663913 is an apocalyptic number.

It is an amenable number.

423663913 is a deficient number, since it is larger than the sum of its proper divisors (1).

423663913 is an equidigital number, since it uses as much as digits as its factorization.

423663913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 37.

The square root of 423663913 is about 20583.0977503387. The cubic root of 423663913 is about 751.0586017062.

The spelling of 423663913 in words is "four hundred twenty-three million, six hundred sixty-three thousand, nine hundred thirteen".