9918772 has 6 divisors (see below), whose sum is σ = 17357858. Its totient is φ = 4959384.

The previous prime is 9918763. The next prime is 9918787. The reversal of 9918772 is 2778199.

It is a happy number.

9918772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7862416 + 2056356 = 2804^2 + 1434^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239843 + ... + 1239850.

Almost surely, 2^9918772 is an apocalyptic number.

It is an amenable number.

9918772 is a deficient number, since it is larger than the sum of its proper divisors (7439086).

9918772 is a wasteful number, since it uses less digits than its factorization.

9918772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479697 (or 2479695 counting only the distinct ones).

The product of its digits is 63504, while the sum is 43.

The square root of 9918772 is about 3149.4081983763. The cubic root of 9918772 is about 214.8585476631.

The spelling of 9918772 in words is "nine million, nine hundred eighteen thousand, seven hundred seventy-two".