2045309999 has 4 divisors (see below), whose sum is σ = 2115837960. Its totient is φ = 1974782040.

The previous prime is 2045309957. The next prime is 2045310023. The reversal of 2045309999 is 9999035402.

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

It is a cyclic number.

It is not a de Polignac number, because 2045309999 - 2²⁰ = 2044261423 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 (2045329999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35263937 + ... + 35263994.

It is an arithmetic number, because the mean of its divisors is an integer number (528959490).

Almost surely, 2^2045309999 is an apocalyptic number.

2045309999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2045309999 is a deficient number, since it is larger than the sum of its proper divisors (70527961).

2045309999 is an equidigital number, since it uses as much as digits as its factorization.

2045309999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70527960.

The product of its (nonzero) digits is 787320, while the sum is 50.

The square root of 2045309999 is about 45225.1036372500. The cubic root of 2045309999 is about 1269.3645940034.

The spelling of 2045309999 in words is "two billion, forty-five million, three hundred nine thousand, nine hundred ninety-nine".