663547 has 2 divisors, whose sum is σ = 663548. Its totient is φ = 663546.

The previous prime is 663541. The next prime is 663557. The reversal of 663547 is 745366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663547 - 2³ = 663539 is a prime.

It is not a weakly prime, because it can be changed into another prime (663541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331773 + 331774.

It is an arithmetic number, because the mean of its divisors is an integer number (331774).

2⁶⁶³⁵⁴⁷ is an apocalyptic number.

663547 is a deficient number, since it is larger than the sum of its proper divisors (1).

663547 is an equidigital number, since it uses as much as digits as its factorization.

663547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 663547 is about 814.5839428813. The cubic root of 663547 is about 87.2215693774.

The spelling of 663547 in words is "six hundred sixty-three thousand, five hundred forty-seven".