663292873 has 2 divisors, whose sum is σ = 663292874. Its totient is φ = 663292872.

The previous prime is 663292871. The next prime is 663292891. The reversal of 663292873 is 378292366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535783609 + 127509264 = 23147^2 + 11292^2 .

It is a cyclic number.

It is not a de Polignac number, because 663292873 - 2¹ = 663292871 is a prime.

Together with 663292871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (663292871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331646436 + 331646437.

It is an arithmetic number, because the mean of its divisors is an integer number (331646437).

Almost surely, 2^663292873 is an apocalyptic number.

It is an amenable number.

663292873 is a deficient number, since it is larger than the sum of its proper divisors (1).

663292873 is an equidigital number, since it uses as much as digits as its factorization.

663292873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 46.

The square root of 663292873 is about 25754.4728736583. The cubic root of 663292873 is about 872.1043317251.

The spelling of 663292873 in words is "six hundred sixty-three million, two hundred ninety-two thousand, eight hundred seventy-three".