9923744065 has 4 divisors (see below), whose sum is σ = 11908492884. Its totient is φ = 7938995248.

The previous prime is 9923744057. The next prime is 9923744071. The reversal of 9923744065 is 5604473299.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6431879601 + 3491864464 = 80199^2 + 59092^2 .

It is a cyclic number.

It is not a de Polignac number, because 9923744065 - 2³ = 9923744057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992374402 + ... + 992374411.

It is an arithmetic number, because the mean of its divisors is an integer number (2977123221).

Almost surely, 2^9923744065 is an apocalyptic number.

It is an amenable number.

9923744065 is a deficient number, since it is larger than the sum of its proper divisors (1984748819).

9923744065 is a wasteful number, since it uses less digits than its factorization.

9923744065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984748818.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The square root of 9923744065 is about 99617.9906693565. The cubic root of 9923744065 is about 2148.9444297387.

The spelling of 9923744065 in words is "nine billion, nine hundred twenty-three million, seven hundred forty-four thousand, sixty-five".