645335287 has 8 divisors (see below), whose sum is σ = 656332992. Its totient is φ = 634351200.

The previous prime is 645335267. The next prime is 645335291. The reversal of 645335287 is 782533546.

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

It is not a de Polignac number, because 645335287 - 2¹¹ = 645333239 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 (645335237) 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, 148962 + ... + 153232.

It is an arithmetic number, because the mean of its divisors is an integer number (82041624).

Almost surely, 2^645335287 is an apocalyptic number.

645335287 is a deficient number, since it is larger than the sum of its proper divisors (10997705).

645335287 is a wasteful number, since it uses less digits than its factorization.

645335287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809.

The product of its digits is 604800, while the sum is 43.

The square root of 645335287 is about 25403.4502971545. The cubic root of 645335287 is about 864.1619455059.

The spelling of 645335287 in words is "six hundred forty-five million, three hundred thirty-five thousand, two hundred eighty-seven".