9918923 has 12 divisors (see below), whose sum is σ = 11852352. Its totient is φ = 8270640.

The previous prime is 9918917. The next prime is 9918941. The reversal of 9918923 is 3298199.

It is not a de Polignac number, because 9918923 - 2¹⁴ = 9902539 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9918983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 923 + ... + 4548.

It is an arithmetic number, because the mean of its divisors is an integer number (987696).

Almost surely, 2^9918923 is an apocalyptic number.

9918923 is a deficient number, since it is larger than the sum of its proper divisors (1933429).

9918923 is a wasteful number, since it uses less digits than its factorization.

9918923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5522 (or 5515 counting only the distinct ones).

The product of its digits is 34992, while the sum is 41.

The square root of 9918923 is about 3149.4321710429. The cubic root of 9918923 is about 214.8596379686.

The spelling of 9918923 in words is "nine million, nine hundred eighteen thousand, nine hundred twenty-three".