9918913 has 4 divisors (see below), whose sum is σ = 10058688. Its totient is φ = 9779140.

The previous prime is 9918889. The next prime is 9918917. The reversal of 9918913 is 3198199.

9918913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9918913 - 2²¹ = 7821761 is a prime.

It is a Duffinian number.

9918913 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9918917) 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, 69781 + ... + 69922.

It is an arithmetic number, because the mean of its divisors is an integer number (2514672).

Almost surely, 2^9918913 is an apocalyptic number.

It is an amenable number.

9918913 is a deficient number, since it is larger than the sum of its proper divisors (139775).

9918913 is a wasteful number, since it uses less digits than its factorization.

9918913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139774.

The product of its digits is 17496, while the sum is 40.

The square root of 9918913 is about 3149.4305834547. The cubic root of 9918913 is about 214.8595657633.

The spelling of 9918913 in words is "nine million, nine hundred eighteen thousand, nine hundred thirteen".