99686775 has 24 divisors (see below), whose sum is σ = 170502480. Its totient is φ = 51331840.

The previous prime is 99686767. The next prime is 99686789. The reversal of 99686775 is 57768699.

It is not a de Polignac number, because 99686775 - 2³ = 99686767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20742 + ... + 25091.

It is an arithmetic number, because the mean of its divisors is an integer number (7104270).

Almost surely, 2^99686775 is an apocalyptic number.

99686775 is a deficient number, since it is larger than the sum of its proper divisors (70815705).

99686775 is a wasteful number, since it uses less digits than its factorization.

99686775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45875 (or 45870 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 57.

The square root of 99686775 is about 9984.3264670182. The cubic root of 99686775 is about 463.6737559406.

The spelling of 99686775 in words is "ninety-nine million, six hundred eighty-six thousand, seven hundred seventy-five".