9399661 has 4 divisors (see below), whose sum is σ = 9894400. Its totient is φ = 8904924.

The previous prime is 9399653. The next prime is 9399743. The reversal of 9399661 is 1669939.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9399661 - 2³ = 9399653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9399601) 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, 247341 + ... + 247378.

It is an arithmetic number, because the mean of its divisors is an integer number (2473600).

Almost surely, 2^9399661 is an apocalyptic number.

It is an amenable number.

9399661 is a deficient number, since it is larger than the sum of its proper divisors (494739).

9399661 is a wasteful number, since it uses less digits than its factorization.

9399661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494738.

The product of its digits is 78732, while the sum is 43.

The square root of 9399661 is about 3065.8866580485. The cubic root of 9399661 is about 211.0428923830.

The spelling of 9399661 in words is "nine million, three hundred ninety-nine thousand, six hundred sixty-one".