97999987 has 8 divisors (see below), whose sum is σ = 102595104. Its totient is φ = 93432768.

The previous prime is 97999949. The next prime is 98000027. The reversal of 97999987 is 78999979.

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 97999987 - 2⁷ = 97999859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97999927) 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, 393 + ... + 14005.

It is an arithmetic number, because the mean of its divisors is an integer number (12824388).

Almost surely, 2^97999987 is an apocalyptic number.

97999987 is a deficient number, since it is larger than the sum of its proper divisors (4595117).

97999987 is a wasteful number, since it uses less digits than its factorization.

97999987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13949.

The product of its digits is 23147208, while the sum is 67.

The square root of 97999987 is about 9899.4942800125. The cubic root of 97999987 is about 461.0436088196.

The spelling of 97999987 in words is "ninety-seven million, nine hundred ninety-nine thousand, nine hundred eighty-seven".