99855969 has 4 divisors (see below), whose sum is σ = 133141296. Its totient is φ = 66570644.

The previous prime is 99855937. The next prime is 99855979. The reversal of 99855969 is 96955899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99855969 - 2⁵ = 99855937 is a prime.

It is a super-2 number, since 2×99855969² = 19942429089857922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99855979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16642659 + ... + 16642664.

It is an arithmetic number, because the mean of its divisors is an integer number (33285324).

Almost surely, 2^99855969 is an apocalyptic number.

It is an amenable number.

99855969 is a deficient number, since it is larger than the sum of its proper divisors (33285327).

99855969 is a wasteful number, since it uses less digits than its factorization.

99855969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33285326.

The product of its digits is 7873200, while the sum is 60.

The square root of 99855969 is about 9992.7958550148. The cubic root of 99855969 is about 463.9359320602.

The spelling of 99855969 in words is "ninety-nine million, eight hundred fifty-five thousand, nine hundred sixty-nine".