9667649 has 4 divisors (see below), whose sum is σ = 9695700. Its totient is φ = 9639600.

The previous prime is 9667639. The next prime is 9667661. The reversal of 9667649 is 9467669.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9467669 = 457 ⋅20717.

It can be written as a sum of positive squares in 2 ways, for example, as 5607424 + 4060225 = 2368^2 + 2015^2 .

It is a cyclic number.

It is not a de Polignac number, because 9667649 - 2⁴ = 9667633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9667639) 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, 13502 + ... + 14199.

It is an arithmetic number, because the mean of its divisors is an integer number (2423925).

Almost surely, 2^9667649 is an apocalyptic number.

It is an amenable number.

9667649 is a deficient number, since it is larger than the sum of its proper divisors (28051).

9667649 is a wasteful number, since it uses less digits than its factorization.

9667649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28050.

The product of its digits is 489888, while the sum is 47.

The square root of 9667649 is about 3109.2843227984. The cubic root of 9667649 is about 213.0297665351.

The spelling of 9667649 in words is "nine million, six hundred sixty-seven thousand, six hundred forty-nine".