9659999 has 6 divisors (see below), whose sum is σ = 10195560. Its totient is φ = 9151236.

The previous prime is 9659989. The next prime is 9660019. The reversal of 9659999 is 9999569.

It is not a de Polignac number, because 9659999 - 2⁴ = 9659983 is a prime.

It is a Duffinian number.

9659999 is a modest number, since divided by 9999 gives 965 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9659959) 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, 13019 + ... + 13740.

It is an arithmetic number, because the mean of its divisors is an integer number (1699260).

Almost surely, 2^9659999 is an apocalyptic number.

9659999 is a deficient number, since it is larger than the sum of its proper divisors (535561).

9659999 is a wasteful number, since it uses less digits than its factorization.

9659999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26797 (or 26778 counting only the distinct ones).

The product of its digits is 1771470, while the sum is 56.

The square root of 9659999 is about 3108.0538927116. The cubic root of 9659999 is about 212.9735616343.

The spelling of 9659999 in words is "nine million, six hundred fifty-nine thousand, nine hundred ninety-nine".