646063 has 4 divisors (see below), whose sum is σ = 704808. Its totient is φ = 587320.

The previous prime is 646039. The next prime is 646067. The reversal of 646063 is 360646.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646063 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 (646067) 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, 29356 + ... + 29377.

It is an arithmetic number, because the mean of its divisors is an integer number (176202).

2⁶⁴⁶⁰⁶³ is an apocalyptic number.

646063 is a deficient number, since it is larger than the sum of its proper divisors (58745).

646063 is a wasteful number, since it uses less digits than its factorization.

646063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58744.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 646063 is about 803.7804426583. The cubic root of 646063 is about 86.4486647855.

The spelling of 646063 in words is "six hundred forty-six thousand, sixty-three".