945649809 has 36 divisors (see below), whose sum is σ = 1533941136. Its totient is φ = 581913072.

The previous prime is 945649787. The next prime is 945649813. The reversal of 945649809 is 908946549.

945649809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 945649809 - 2⁷ = 945649681 is a prime.

It is a super-2 number, since 2×945649809² = 1788507122523472962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (945649819) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 29554 + ... + 52580.

It is an arithmetic number, because the mean of its divisors is an integer number (42609476).

Almost surely, 2^945649809 is an apocalyptic number.

It is an amenable number.

945649809 is a deficient number, since it is larger than the sum of its proper divisors (588291327).

945649809 is a wasteful number, since it uses less digits than its factorization.

945649809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23068 (or 23043 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 945649809 is about 30751.4196257669. The cubic root of 945649809 is about 981.5447693860.

The spelling of 945649809 in words is "nine hundred forty-five million, six hundred forty-nine thousand, eight hundred nine".