9669621 has 8 divisors (see below), whose sum is σ = 13884640. Its totient is φ = 5950512.

The previous prime is 9669619. The next prime is 9669623. The reversal of 9669621 is 1269669.

It is an interprime number because it is at equal distance from previous prime (9669619) and next prime (9669623).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9669621 - 2¹ = 9669619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 247939 = 9669621 / (9 + 6 + 6 + 9 + 6 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9669621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9669623) 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, 123931 + ... + 124008.

It is an arithmetic number, because the mean of its divisors is an integer number (1735580).

Almost surely, 2^9669621 is an apocalyptic number.

It is an amenable number.

9669621 is a deficient number, since it is larger than the sum of its proper divisors (4215019).

9669621 is a wasteful number, since it uses less digits than its factorization.

9669621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247955.

The product of its digits is 34992, while the sum is 39.

The square root of 9669621 is about 3109.6014214044. The cubic root of 9669621 is about 213.0442501025.

The spelling of 9669621 in words is "nine million, six hundred sixty-nine thousand, six hundred twenty-one".