9949669 has 4 divisors (see below), whose sum is σ = 9955980. Its totient is φ = 9943360.

The previous prime is 9949663. The next prime is 9949703. The reversal of 9949669 is 9669499.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8485569 + 1464100 = 2913^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 9949669 - 2³ = 9949661 is a prime.

It is a super-2 number, since 2×9949669² = 197991826419122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

9949669 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9949661) 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, 1479 + ... + 4699.

It is an arithmetic number, because the mean of its divisors is an integer number (2488995).

Almost surely, 2^9949669 is an apocalyptic number.

It is an amenable number.

9949669 is a deficient number, since it is larger than the sum of its proper divisors (6311).

9949669 is a wasteful number, since it uses less digits than its factorization.

9949669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6310.

The product of its digits is 944784, while the sum is 52.

The square root of 9949669 is about 3154.3095916539. The cubic root of 9949669 is about 215.0814113901.

The spelling of 9949669 in words is "nine million, nine hundred forty-nine thousand, six hundred sixty-nine".