945599999 has 4 divisors (see below), whose sum is σ = 995368440. Its totient is φ = 895831560.

The previous prime is 945599987. The next prime is 945600043. The reversal of 945599999 is 999995549.

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 945599999 - 2⁴ = 945599983 is a prime.

It is a Duffinian number.

945599999 is a modest number, since divided by 99999 gives 9455 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945599399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24884192 + ... + 24884229.

It is an arithmetic number, because the mean of its divisors is an integer number (248842110).

Almost surely, 2^945599999 is an apocalyptic number.

945599999 is a deficient number, since it is larger than the sum of its proper divisors (49768441).

945599999 is a wasteful number, since it uses less digits than its factorization.

945599999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49768440.

The product of its digits is 53144100, while the sum is 68.

The square root of 945599999 is about 30750.6097337923. The cubic root of 945599999 is about 981.5275355211.

The spelling of 945599999 in words is "nine hundred forty-five million, five hundred ninety-nine thousand, nine hundred ninety-nine".