9909946 has 16 divisors (see below), whose sum is σ = 16125480. Its totient is φ = 4549120.

The previous prime is 9909943. The next prime is 9909961. The reversal of 9909946 is 6499099.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5546025 + 4363921 = 2355^2 + 2089^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9909896 and 9909905.

It is not an unprimeable number, because it can be changed into a prime (9909943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2161 + ... + 4948.

Almost surely, 2^9909946 is an apocalyptic number.

9909946 is a deficient number, since it is larger than the sum of its proper divisors (6215534).

9909946 is a wasteful number, since it uses less digits than its factorization.

9909946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7169.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 9909946 is about 3148.0066708951. The cubic root of 9909946 is about 214.7947997081.

It can be divided in two parts, 99099 and 46, that multiplied together give a palindrome (4558554).

The spelling of 9909946 in words is "nine million, nine hundred nine thousand, nine hundred forty-six".