9997518 has 16 divisors (see below), whose sum is σ = 20684880. Its totient is φ = 3217536.

The previous prime is 9997517. The next prime is 9997523. The reversal of 9997518 is 8157999.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997517) by changing a digit.

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, 28555 + ... + 28902.

It is an arithmetic number, because the mean of its divisors is an integer number (1292805).

Almost surely, 2^9997518 is an apocalyptic number.

9997518 is an abundant number, since it is smaller than the sum of its proper divisors (10687362).

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

9997518 is a wasteful number, since it uses less digits than its factorization.

9997518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57491.

The product of its digits is 204120, while the sum is 48.

The square root of 9997518 is about 3161.8851971569. The cubic root of 9997518 is about 215.4256431720.

The spelling of 9997518 in words is "nine million, nine hundred ninety-seven thousand, five hundred eighteen".