663533197 has 2 divisors, whose sum is σ = 663533198. Its totient is φ = 663533196.

The previous prime is 663533191. The next prime is 663533203. The reversal of 663533197 is 791335366.

It is a balanced prime because it is at equal distance from previous prime (663533191) and next prime (663533203).

It can be written as a sum of positive squares in only one way, i.e., 538518436 + 125014761 = 23206^2 + 11181^2 .

It is a cyclic number.

It is not a de Polignac number, because 663533197 - 2¹¹ = 663531149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663533191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331766598 + 331766599.

It is an arithmetic number, because the mean of its divisors is an integer number (331766599).

Almost surely, 2^663533197 is an apocalyptic number.

It is an amenable number.

663533197 is a deficient number, since it is larger than the sum of its proper divisors (1).

663533197 is an equidigital number, since it uses as much as digits as its factorization.

663533197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 43.

The square root of 663533197 is about 25759.1381261097. The cubic root of 663533197 is about 872.2096458342.

The spelling of 663533197 in words is "six hundred sixty-three million, five hundred thirty-three thousand, one hundred ninety-seven".