9639949 has 6 divisors (see below), whose sum is σ = 10596110. Its totient is φ = 8763480.

The previous prime is 9639947. The next prime is 9639979. The reversal of 9639949 is 9499369.

It can be written as a sum of positive squares in only one way, i.e., 8305924 + 1334025 = 2882^2 + 1155^2 .

It is not a de Polignac number, because 9639949 - 2¹ = 9639947 is a prime.

It is a Duffinian number.

9639949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9639947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39714 + ... + 39955.

Almost surely, 2^9639949 is an apocalyptic number.

It is an amenable number.

9639949 is a deficient number, since it is larger than the sum of its proper divisors (956161).

9639949 is a wasteful number, since it uses less digits than its factorization.

9639949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79691 (or 79680 counting only the distinct ones).

The product of its digits is 472392, while the sum is 49.

The square root of 9639949 is about 3104.8267262442. The cubic root of 9639949 is about 212.8261124254.

The spelling of 9639949 in words is "nine million, six hundred thirty-nine thousand, nine hundred forty-nine".