9997398 has 16 divisors (see below), whose sum is σ = 22216560. Its totient is φ = 3332448.

The previous prime is 9997397. The next prime is 9997441. The reversal of 9997398 is 8937999.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 185137 = 9997398 / (9 + 9 + 9 + 7 + 3 + 9 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92515 + ... + 92622.

It is an arithmetic number, because the mean of its divisors is an integer number (1388535).

Almost surely, 2^9997398 is an apocalyptic number.

9997398 is an abundant number, since it is smaller than the sum of its proper divisors (12219162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9997398 is a wasteful number, since it uses less digits than its factorization.

9997398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185148 (or 185142 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 9997398 is about 3161.8662210789. The cubic root of 9997398 is about 215.4247812520.

The spelling of 9997398 in words is "nine million, nine hundred ninety-seven thousand, three hundred ninety-eight".