646054303 has 4 divisors (see below), whose sum is σ = 646106328. Its totient is φ = 646002280.

The previous prime is 646054289. The next prime is 646054309. The reversal of 646054303 is 303450646.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 646054303 - 2²⁵ = 612499871 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646054309) 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, 4713 + ... + 36253.

It is an arithmetic number, because the mean of its divisors is an integer number (161526582).

Almost surely, 2^646054303 is an apocalyptic number.

646054303 is a deficient number, since it is larger than the sum of its proper divisors (52025).

646054303 is a wasteful number, since it uses less digits than its factorization.

646054303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52024.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 646054303 is about 25417.5982933085. The cubic root of 646054303 is about 864.4827687317.

The spelling of 646054303 in words is "six hundred forty-six million, fifty-four thousand, three hundred three".