9945347009 has 8 divisors (see below), whose sum is σ = 10726297512. Its totient is φ = 9166671360.

The previous prime is 9945346967. The next prime is 9945347017. The reversal of 9945347009 is 9007435499.

It can be written as a sum of positive squares in 4 ways, for example, as 1214313409 + 8731033600 = 34847^2 + 93440^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9945347009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9945347059) 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, 559622 + ... + 577119.

It is an arithmetic number, because the mean of its divisors is an integer number (1340787189).

Almost surely, 2^9945347009 is an apocalyptic number.

It is an amenable number.

9945347009 is a deficient number, since it is larger than the sum of its proper divisors (780950503).

9945347009 is a wasteful number, since it uses less digits than its factorization.

9945347009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137427.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The square root of 9945347009 is about 99726.3606525376. The cubic root of 9945347009 is about 2150.5026413767.

The spelling of 9945347009 in words is "nine billion, nine hundred forty-five million, three hundred forty-seven thousand, nine".