645027303 has 8 divisors (see below), whose sum is σ = 868386688. Its totient is φ = 425843064.

The previous prime is 645027289. The next prime is 645027307. The reversal of 645027303 is 303720546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 645027303 - 2⁶ = 645027239 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 (645027307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1043425 + ... + 1044042.

It is an arithmetic number, because the mean of its divisors is an integer number (108548336).

Almost surely, 2^645027303 is an apocalyptic number.

645027303 is a deficient number, since it is larger than the sum of its proper divisors (223359385).

645027303 is a wasteful number, since it uses less digits than its factorization.

645027303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087573.

The product of its (nonzero) digits is 15120, while the sum is 30.

The square root of 645027303 is about 25397.3877199999. The cubic root of 645027303 is about 864.0244508791.

Adding to 645027303 its reverse (303720546), we get a palindrome (948747849).

The spelling of 645027303 in words is "six hundred forty-five million, twenty-seven thousand, three hundred three".