663031 has 2 divisors, whose sum is σ = 663032. Its totient is φ = 663030.

The previous prime is 663007. The next prime is 663037. The reversal of 663031 is 130366.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663031 - 2⁵ = 662999 is a prime.

It is a super-2 number, since 2×663031² = 879220213922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331515 + 331516.

It is an arithmetic number, because the mean of its divisors is an integer number (331516).

2⁶⁶³⁰³¹ is an apocalyptic number.

663031 is a deficient number, since it is larger than the sum of its proper divisors (1).

663031 is an equidigital number, since it uses as much as digits as its factorization.

663031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 663031 is about 814.2671551770. The cubic root of 663031 is about 87.1989545508.

Adding to 663031 its reverse (130366), we get a palindrome (793397).

The spelling of 663031 in words is "six hundred sixty-three thousand, thirty-one".