9471945509 has 8 divisors (see below), whose sum is σ = 10393020792. Its totient is φ = 8578365120.

The previous prime is 9471945481. The next prime is 9471945541. The reversal of 9471945509 is 9055491749.

It can be written as a sum of positive squares in 4 ways, for example, as 1967188609 + 7504756900 = 44353^2 + 86630^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9471945509 - 2⁸ = 9471945253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9471945559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6873002 + ... + 6874379.

It is an arithmetic number, because the mean of its divisors is an integer number (1299127599).

Almost surely, 2^9471945509 is an apocalyptic number.

It is an amenable number.

9471945509 is a deficient number, since it is larger than the sum of its proper divisors (921075283).

9471945509 is a wasteful number, since it uses less digits than its factorization.

9471945509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13747447.

The product of its (nonzero) digits is 2041200, while the sum is 53.

The square root of 9471945509 is about 97323.9205385809. The cubic root of 9471945509 is about 2115.8249317206.

The spelling of 9471945509 in words is "nine billion, four hundred seventy-one million, nine hundred forty-five thousand, five hundred nine".