663934231 has 2 divisors, whose sum is σ = 663934232. Its totient is φ = 663934230.

The previous prime is 663934211. The next prime is 663934259. The reversal of 663934231 is 132439366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663934231 - 2¹¹ = 663932183 is a prime.

It is a super-2 number, since 2×663934231² = 881617326187122722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663934211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331967115 + 331967116.

It is an arithmetic number, because the mean of its divisors is an integer number (331967116).

Almost surely, 2^663934231 is an apocalyptic number.

663934231 is a deficient number, since it is larger than the sum of its proper divisors (1).

663934231 is an equidigital number, since it uses as much as digits as its factorization.

663934231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 37.

The square root of 663934231 is about 25766.9212557496. The cubic root of 663934231 is about 872.3853292208.

The spelling of 663934231 in words is "six hundred sixty-three million, nine hundred thirty-four thousand, two hundred thirty-one".