9997658 has 16 divisors (see below), whose sum is σ = 16489440. Its totient is φ = 4508400.

The previous prime is 9997643. The next prime is 9997661. The reversal of 9997658 is 8567999.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1148 + ... + 4616.

It is an arithmetic number, because the mean of its divisors is an integer number (1030590).

Almost surely, 2^9997658 is an apocalyptic number.

9997658 is a deficient number, since it is larger than the sum of its proper divisors (6491782).

9997658 is a wasteful number, since it uses less digits than its factorization.

9997658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613.

The product of its digits is 1224720, while the sum is 53.

The square root of 9997658 is about 3161.9073357706. The cubic root of 9997658 is about 215.4266487365.

The spelling of 9997658 in words is "nine million, nine hundred ninety-seven thousand, six hundred fifty-eight".