99855407 has 2 divisors, whose sum is σ = 99855408. Its totient is φ = 99855406.

The previous prime is 99855403. The next prime is 99855409. The reversal of 99855407 is 70455899.

It is a strong prime.

It is an emirp because it is prime and its reverse (70455899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99855407 - 2² = 99855403 is a prime.

It is a super-2 number, since 2×99855407² = 19942204614271298, which contains 22 as substring.

Together with 99855409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99855403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49927703 + 49927704.

It is an arithmetic number, because the mean of its divisors is an integer number (49927704).

Almost surely, 2^99855407 is an apocalyptic number.

99855407 is a deficient number, since it is larger than the sum of its proper divisors (1).

99855407 is an equidigital number, since it uses as much as digits as its factorization.

99855407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 99855407 is about 9992.7677347169. The cubic root of 99855407 is about 463.9350616984.

The spelling of 99855407 in words is "ninety-nine million, eight hundred fifty-five thousand, four hundred seven".