9918723 has 8 divisors (see below), whose sum is σ = 13268736. Its totient is φ = 6590600.

The previous prime is 9918721. The next prime is 9918743. The reversal of 9918723 is 3278199.

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 9918723 - 2¹ = 9918721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9918721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4383 + ... + 6248.

It is an arithmetic number, because the mean of its divisors is an integer number (1658592).

Almost surely, 2^9918723 is an apocalyptic number.

9918723 is a deficient number, since it is larger than the sum of its proper divisors (3350013).

9918723 is a wasteful number, since it uses less digits than its factorization.

9918723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10945.

The product of its digits is 27216, while the sum is 39.

The square root of 9918723 is about 3149.4004191274. The cubic root of 9918723 is about 214.8581938529.

The spelling of 9918723 in words is "nine million, nine hundred eighteen thousand, seven hundred twenty-three".