663699053 has 2 divisors, whose sum is σ = 663699054. Its totient is φ = 663699052.

The previous prime is 663699037. The next prime is 663699061. The reversal of 663699053 is 350996366.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494751049 + 168948004 = 22243^2 + 12998^2 .

It is a cyclic number.

It is not a de Polignac number, because 663699053 - 2⁴ = 663699037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663698989 and 663699007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663699073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331849526 + 331849527.

It is an arithmetic number, because the mean of its divisors is an integer number (331849527).

Almost surely, 2^663699053 is an apocalyptic number.

It is an amenable number.

663699053 is a deficient number, since it is larger than the sum of its proper divisors (1).

663699053 is an equidigital number, since it uses as much as digits as its factorization.

663699053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 787320, while the sum is 47.

The square root of 663699053 is about 25762.3572873291. The cubic root of 663699053 is about 872.2823119556.

The spelling of 663699053 in words is "six hundred sixty-three million, six hundred ninety-nine thousand, fifty-three".