663103213 has 4 divisors (see below), whose sum is σ = 677211840. Its totient is φ = 648994588.

The previous prime is 663103187. The next prime is 663103229. The reversal of 663103213 is 312301366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 663103213 - 2⁹ = 663102701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663103283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7054243 + ... + 7054336.

It is an arithmetic number, because the mean of its divisors is an integer number (169302960).

Almost surely, 2^663103213 is an apocalyptic number.

It is an amenable number.

663103213 is a deficient number, since it is larger than the sum of its proper divisors (14108627).

663103213 is a wasteful number, since it uses less digits than its factorization.

663103213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14108626.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 663103213 is about 25750.7905315546. The cubic root of 663103213 is about 872.0212014912.

Adding to 663103213 its reverse (312301366), we get a palindrome (975404579).

The spelling of 663103213 in words is "six hundred sixty-three million, one hundred three thousand, two hundred thirteen".