423530917 has 2 divisors, whose sum is σ = 423530918. Its totient is φ = 423530916.

The previous prime is 423530879. The next prime is 423530923. The reversal of 423530917 is 719035324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335659041 + 87871876 = 18321^2 + 9374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423530917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423530927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211765458 + 211765459.

It is an arithmetic number, because the mean of its divisors is an integer number (211765459).

Almost surely, 2^423530917 is an apocalyptic number.

It is an amenable number.

423530917 is a deficient number, since it is larger than the sum of its proper divisors (1).

423530917 is an equidigital number, since it uses as much as digits as its factorization.

423530917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 423530917 is about 20579.8667877127. The cubic root of 423530917 is about 750.9800030491.

The spelling of 423530917 in words is "four hundred twenty-three million, five hundred thirty thousand, nine hundred seventeen".