99955863 has 24 divisors (see below), whose sum is σ = 171120768. Its totient is φ = 57116664.

The previous prime is 99955829. The next prime is 99955879. The reversal of 99955863 is 36855999.

It is not a de Polignac number, because 99955863 - 2⁹ = 99955351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99955813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27681 + ... + 31082.

It is an arithmetic number, because the mean of its divisors is an integer number (7130032).

Almost surely, 2^99955863 is an apocalyptic number.

99955863 is a deficient number, since it is larger than the sum of its proper divisors (71164905).

99955863 is an equidigital number, since it uses as much as digits as its factorization.

99955863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58785 (or 58773 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The square root of 99955863 is about 9997.7929064369. The cubic root of 99955863 is about 464.0905847099.

It can be divided in two parts, 9995 and 5863, that multiplied together give a palindrome (58600685).

The spelling of 99955863 in words is "ninety-nine million, nine hundred fifty-five thousand, eight hundred sixty-three".