663604343 has 2 divisors, whose sum is σ = 663604344. Its totient is φ = 663604342.

The previous prime is 663604307. The next prime is 663604363. The reversal of 663604343 is 343406366.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663604343 - 2¹⁰ = 663603319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663604363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331802171 + 331802172.

It is an arithmetic number, because the mean of its divisors is an integer number (331802172).

Almost surely, 2^663604343 is an apocalyptic number.

663604343 is a deficient number, since it is larger than the sum of its proper divisors (1).

663604343 is an equidigital number, since it uses as much as digits as its factorization.

663604343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 35.

The square root of 663604343 is about 25760.5190747392. The cubic root of 663604343 is about 872.2408183563.

The spelling of 663604343 in words is "six hundred sixty-three million, six hundred four thousand, three hundred forty-three".