97999999 has 8 divisors (see below), whose sum is σ = 98968320. Its totient is φ = 97036800.

The previous prime is 97999949. The next prime is 98000027. The reversal of 97999999 is 99999979.

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

It is a cyclic number.

It is not a de Polignac number, because 97999999 - 2¹¹ = 97997951 is a prime.

It is a Duffinian number.

97999999 is a modest number, since divided by 9999 gives 9799 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97999919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44967 + ... + 47095.

It is an arithmetic number, because the mean of its divisors is an integer number (12371040).

Almost surely, 2^97999999 is an apocalyptic number.

97999999 is a deficient number, since it is larger than the sum of its proper divisors (968321).

97999999 is a wasteful number, since it uses less digits than its factorization.

97999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561.

The product of its digits is 33480783, while the sum is 70.

The square root of 97999999 is about 9899.4948861040. The cubic root of 97999999 is about 461.0436276377.

It can be divided in two parts, 9 and 7999999, that added together give a palindrome (8000008).

The spelling of 97999999 in words is "ninety-seven million, nine hundred ninety-nine thousand, nine hundred ninety-nine".