645354299 has 8 divisors (see below), whose sum is σ = 657054720. Its totient is φ = 633747496.

The previous prime is 645354293. The next prime is 645354317. The reversal of 645354299 is 992453546.

It is a happy number.

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

It is not a de Polignac number, because 645354299 - 2¹² = 645350203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645354293) 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, 9419 + ... + 37140.

It is an arithmetic number, because the mean of its divisors is an integer number (82131840).

Almost surely, 2^645354299 is an apocalyptic number.

645354299 is a deficient number, since it is larger than the sum of its proper divisors (11700421).

645354299 is a wasteful number, since it uses less digits than its factorization.

645354299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46809.

The product of its digits is 1166400, while the sum is 47.

The square root of 645354299 is about 25403.8244955361. The cubic root of 645354299 is about 864.1704316814.

The spelling of 645354299 in words is "six hundred forty-five million, three hundred fifty-four thousand, two hundred ninety-nine".