945747009 has 63 divisors (see below), whose sum is σ = 1529105907. Its totient is φ = 584553024.

The previous prime is 945746987. The next prime is 945747017. The reversal of 945747009 is 900747549.

The square root of 945747009 is 30753.

It is a perfect power (a square), and thus also a powerful number.

945747009 is a `hidden beast` number, since 9 + 4 + 574 + 70 + 0 + 9 = 666.

945747009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 736308225 + 209438784 = 27135^2 + 14472^2 .

It is not a de Polignac number, because 945747009 - 2⁷ = 945746881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (945747409) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 14115594 + ... + 14115660.

Almost surely, 2^945747009 is an apocalyptic number.

945747009 is the 30753-rd square number.

945747009 is the 15377-th centered octagonal number.

It is an amenable number.

945747009 is a deficient number, since it is larger than the sum of its proper divisors (583358898).

945747009 is an frugal number, since it uses more digits than its factorization.

945747009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The cubic root of 945747009 is about 981.5783980726.

The spelling of 945747009 in words is "nine hundred forty-five million, seven hundred forty-seven thousand, nine".