97997999 has 8 divisors (see below), whose sum is σ = 108261120. Its totient is φ = 87960600.

The previous prime is 97997971. The next prime is 97998001. The reversal of 97997999 is 99979979.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97997999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97997969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55517 + ... + 57254.

It is an arithmetic number, because the mean of its divisors is an integer number (13532640).

Almost surely, 2^97997999 is an apocalyptic number.

97997999 is a deficient number, since it is larger than the sum of its proper divisors (10263121).

97997999 is a wasteful number, since it uses less digits than its factorization.

97997999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112861.

The product of its digits is 26040609, while the sum is 68.

The square root of 97997999 is about 9899.3938703337. The cubic root of 97997999 is about 461.0404912651.

The spelling of 97997999 in words is "ninety-seven million, nine hundred ninety-seven thousand, nine hundred ninety-nine".