9999051923 has 8 divisors (see below), whose sum is σ = 11428335360. Its totient is φ = 8569980360.

The previous prime is 9999051911. The next prime is 9999051943. The reversal of 9999051923 is 3291509999.

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

It is a cyclic number.

It is not a de Polignac number, because 9999051923 - 2⁶ = 9999051859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9999051943) 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, 65978 + ... + 156048.

It is an arithmetic number, because the mean of its divisors is an integer number (1428541920).

Almost surely, 2^9999051923 is an apocalyptic number.

9999051923 is a deficient number, since it is larger than the sum of its proper divisors (1429283437).

9999051923 is a wasteful number, since it uses less digits than its factorization.

9999051923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105937.

The product of its (nonzero) digits is 1771470, while the sum is 56.

The square root of 9999051923 is about 99995.2595026384. The cubic root of 9999051923 is about 2154.3666022142.

The spelling of 9999051923 in words is "nine billion, nine hundred ninety-nine million, fifty-one thousand, nine hundred twenty-three".