9998997 has 32 divisors (see below), whose sum is σ = 15206400. Its totient is φ = 5810112.

The previous prime is 9998977. The next prime is 9999047. The reversal of 9998997 is 7998999.

It is not a de Polignac number, because 9998997 - 2⁸ = 9998741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9998997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37888 + ... + 38150.

It is an arithmetic number, because the mean of its divisors is an integer number (475200).

Almost surely, 2^9998997 is an apocalyptic number.

It is an amenable number.

9998997 is a deficient number, since it is larger than the sum of its proper divisors (5207403).

9998997 is a wasteful number, since it uses less digits than its factorization.

9998997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337.

The product of its digits is 3306744, while the sum is 60.

The square root of 9998997 is about 3162.1190679669. The cubic root of 9998997 is about 215.4362657690.

The spelling of 9998997 in words is "nine million, nine hundred ninety-eight thousand, nine hundred ninety-seven".