204945307 has 4 divisors (see below), whose sum is σ = 234223216. Its totient is φ = 175667400.

The previous prime is 204945289. The next prime is 204945313. The reversal of 204945307 is 703549402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204945307 is a prime.

It is a super-2 number, since 2×204945307² = 84005157722648498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204945317) 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 3 ways as a sum of consecutive naturals, for example, 14638944 + ... + 14638957.

It is an arithmetic number, because the mean of its divisors is an integer number (58555804).

Almost surely, 2^204945307 is an apocalyptic number.

204945307 is a deficient number, since it is larger than the sum of its proper divisors (29277909).

204945307 is an equidigital number, since it uses as much as digits as its factorization.

204945307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29277908.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 204945307 is about 14315.9109734589. The cubic root of 204945307 is about 589.5844119209.

The spelling of 204945307 in words is "two hundred four million, nine hundred forty-five thousand, three hundred seven".