653443423 has 2 divisors, whose sum is σ = 653443424. Its totient is φ = 653443422.

The previous prime is 653443411. The next prime is 653443463. The reversal of 653443423 is 324344356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 653443423 - 2²⁵ = 619888991 is a prime.

It is a super-4 number, since 4×653443423⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653443403) 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, 326721711 + 326721712.

It is an arithmetic number, because the mean of its divisors is an integer number (326721712).

Almost surely, 2^653443423 is an apocalyptic number.

653443423 is a deficient number, since it is larger than the sum of its proper divisors (1).

653443423 is an equidigital number, since it uses as much as digits as its factorization.

653443423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 34.

The square root of 653443423 is about 25562.5394474023. The cubic root of 653443423 is about 867.7660673185.

Adding to 653443423 its reverse (324344356), we get a palindrome (977787779).

The spelling of 653443423 in words is "six hundred fifty-three million, four hundred forty-three thousand, four hundred twenty-three".