663572843 has 2 divisors, whose sum is σ = 663572844. Its totient is φ = 663572842.

The previous prime is 663572831. The next prime is 663572881. The reversal of 663572843 is 348275366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663572843 - 2⁴ = 663572827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663572794 and 663572803.

It is not a weakly prime, because it can be changed into another prime (663572893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331786421 + 331786422.

It is an arithmetic number, because the mean of its divisors is an integer number (331786422).

Almost surely, 2^663572843 is an apocalyptic number.

663572843 is a deficient number, since it is larger than the sum of its proper divisors (1).

663572843 is an equidigital number, since it uses as much as digits as its factorization.

663572843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 44.

The square root of 663572843 is about 25759.9076667600. The cubic root of 663572843 is about 872.2270169495.

The spelling of 663572843 in words is "six hundred sixty-three million, five hundred seventy-two thousand, eight hundred forty-three".