663545131 has 2 divisors, whose sum is σ = 663545132. Its totient is φ = 663545130.

The previous prime is 663545119. The next prime is 663545137. The reversal of 663545131 is 131545366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663545131 - 2¹⁹ = 663020843 is a prime.

It is a super-2 number, since 2×663545131² = 880584281747614322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (663545137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331772565 + 331772566.

It is an arithmetic number, because the mean of its divisors is an integer number (331772566).

Almost surely, 2^663545131 is an apocalyptic number.

663545131 is a deficient number, since it is larger than the sum of its proper divisors (1).

663545131 is an equidigital number, since it uses as much as digits as its factorization.

663545131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 34.

The square root of 663545131 is about 25759.3697710173. The cubic root of 663545131 is about 872.2148748554.

The spelling of 663545131 in words is "six hundred sixty-three million, five hundred forty-five thousand, one hundred thirty-one".