99897866 has 8 divisors (see below), whose sum is σ = 155014020. Its totient is φ = 48226528.

The previous prime is 99897773. The next prime is 99897881. The reversal of 99897866 is 66879899.

It can be written as a sum of positive squares in 2 ways, for example, as 94965025 + 4932841 = 9745^2 + 2221^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 99897799 and 99897808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861131 + ... + 861246.

Almost surely, 2^99897866 is an apocalyptic number.

99897866 is a deficient number, since it is larger than the sum of its proper divisors (55116154).

99897866 is a wasteful number, since it uses less digits than its factorization.

99897866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722408.

The product of its digits is 11757312, while the sum is 62.

The square root of 99897866 is about 9994.8919954145. The cubic root of 99897866 is about 464.0008081882. Note that the first 3 decimals are identical.

The spelling of 99897866 in words is "ninety-nine million, eight hundred ninety-seven thousand, eight hundred sixty-six".