645329333 has 8 divisors (see below), whose sum is σ = 745407360. Its totient is φ = 552153280.

The previous prime is 645329329. The next prime is 645329369. The reversal of 645329333 is 333923546.

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

It is a cyclic number.

It is not a de Polignac number, because 645329333 - 2² = 645329329 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 (645329303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1725293 + ... + 1725666.

It is an arithmetic number, because the mean of its divisors is an integer number (93175920).

Almost surely, 2^645329333 is an apocalyptic number.

It is an amenable number.

645329333 is a deficient number, since it is larger than the sum of its proper divisors (100078027).

645329333 is a wasteful number, since it uses less digits than its factorization.

645329333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450987.

The product of its digits is 174960, while the sum is 38.

The square root of 645329333 is about 25403.3331080786. Note that the first 3 decimals coincide. The cubic root of 645329333 is about 864.1592878507.

The spelling of 645329333 in words is "six hundred forty-five million, three hundred twenty-nine thousand, three hundred thirty-three".