9961659 has 6 divisors (see below), whose sum is σ = 14389076. Its totient is φ = 6641100.

The previous prime is 9961657. The next prime is 9961669. The reversal of 9961659 is 9561699.

It is not a de Polignac number, because 9961659 - 2¹ = 9961657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9961657) 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, 553417 + ... + 553434.

Almost surely, 2^9961659 is an apocalyptic number.

9961659 is a deficient number, since it is larger than the sum of its proper divisors (4427417).

9961659 is a wasteful number, since it uses less digits than its factorization.

9961659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106857 (or 1106854 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 9961659 is about 3156.2095938008. The cubic root of 9961659 is about 215.1677724181.

The spelling of 9961659 in words is "nine million, nine hundred sixty-one thousand, six hundred fifty-nine".