9945659 has 4 divisors (see below), whose sum is σ = 9953160. Its totient is φ = 9938160.

The previous prime is 9945647. The next prime is 9945667. The reversal of 9945659 is 9565499.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9565499 = 37 ⋅258527.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9945659 is a prime.

It is a super-2 number, since 2×9945659² = 197832265888562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9945619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169 + ... + 4610.

It is an arithmetic number, because the mean of its divisors is an integer number (2488290).

Almost surely, 2^9945659 is an apocalyptic number.

9945659 is a deficient number, since it is larger than the sum of its proper divisors (7501).

9945659 is a wasteful number, since it uses less digits than its factorization.

9945659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7500.

The product of its digits is 437400, while the sum is 47.

The square root of 9945659 is about 3153.6738892917. The cubic root of 9945659 is about 215.0525128625.

The spelling of 9945659 in words is "nine million, nine hundred forty-five thousand, six hundred fifty-nine".