9911916923 has 4 divisors (see below), whose sum is σ = 9963811968. Its totient is φ = 9860021880.

The previous prime is 9911916913. The next prime is 9911916947. The reversal of 9911916923 is 3296191199.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9911916923 - 2¹⁴ = 9911900539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9911916913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25947236 + ... + 25947617.

It is an arithmetic number, because the mean of its divisors is an integer number (2490952992).

Almost surely, 2^9911916923 is an apocalyptic number.

9911916923 is a deficient number, since it is larger than the sum of its proper divisors (51895045).

9911916923 is a wasteful number, since it uses less digits than its factorization.

9911916923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51895044.

The product of its digits is 236196, while the sum is 50.

The square root of 9911916923 is about 99558.6104915090. The cubic root of 9911916923 is about 2148.0903846544.

The spelling of 9911916923 in words is "nine billion, nine hundred eleven million, nine hundred sixteen thousand, nine hundred twenty-three".