423423653 has 2 divisors, whose sum is σ = 423423654. Its totient is φ = 423423652.

The previous prime is 423423619. The next prime is 423423667. The reversal of 423423653 is 356324324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282811489 + 140612164 = 16817^2 + 11858^2 .

It is a cyclic number.

It is not a de Polignac number, because 423423653 - 2²⁰ = 422375077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423423673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211711826 + 211711827.

It is an arithmetic number, because the mean of its divisors is an integer number (211711827).

Almost surely, 2^423423653 is an apocalyptic number.

It is an amenable number.

423423653 is a deficient number, since it is larger than the sum of its proper divisors (1).

423423653 is an equidigital number, since it uses as much as digits as its factorization.

423423653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 32.

The square root of 423423653 is about 20577.2605805535. The cubic root of 423423653 is about 750.9165996334.

Adding to 423423653 its reverse (356324324), we get a palindrome (779747977).

The spelling of 423423653 in words is "four hundred twenty-three million, four hundred twenty-three thousand, six hundred fifty-three".