9945574399 has 2 divisors, whose sum is σ = 9945574400. Its totient is φ = 9945574398.

The previous prime is 9945574393. The next prime is 9945574427. The reversal of 9945574399 is 9934755499.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9934755499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9945574399 - 2⁵ = 9945574367 is a prime.

It is a super-2 number, since 2×9945574399² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9945574399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9945574393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4972787199 + 4972787200.

It is an arithmetic number, because the mean of its divisors is an integer number (4972787200).

Almost surely, 2^9945574399 is an apocalyptic number.

9945574399 is a deficient number, since it is larger than the sum of its proper divisors (1).

9945574399 is an equidigital number, since it uses as much as digits as its factorization.

9945574399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55112400, while the sum is 64.

The square root of 9945574399 is about 99727.5007157003. The cubic root of 9945574399 is about 2150.5190309194.

The spelling of 9945574399 in words is "nine billion, nine hundred forty-five million, five hundred seventy-four thousand, three hundred ninety-nine".