9906418 has 4 divisors (see below), whose sum is σ = 14859630. Its totient is φ = 4953208.

The previous prime is 9906401. The next prime is 9906439. The reversal of 9906418 is 8146099.

9906418 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 an emirpimes, since its reverse is a distinct semiprime: 8146099 = 13 ⋅626623.

It can be written as a sum of positive squares in only one way, i.e., 9903609 + 2809 = 3147^2 + 53^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2476603 + ... + 2476606.

Almost surely, 2^9906418 is an apocalyptic number.

9906418 is a deficient number, since it is larger than the sum of its proper divisors (4953212).

9906418 is a wasteful number, since it uses less digits than its factorization.

9906418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4953211.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 9906418 is about 3147.4462664198. The cubic root of 9906418 is about 214.7693072719.

The spelling of 9906418 in words is "nine million, nine hundred six thousand, four hundred eighteen".