99855403 has 2 divisors, whose sum is σ = 99855404. Its totient is φ = 99855402.

The previous prime is 99855383. The next prime is 99855407. The reversal of 99855403 is 30455899.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99855403 - 2²¹ = 97758251 is a prime.

It is a super-3 number, since 3×99855403³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 99855403.

It is not a weakly prime, because it can be changed into another prime (99855407) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49927701 + 49927702.

It is an arithmetic number, because the mean of its divisors is an integer number (49927702).

Almost surely, 2^99855403 is an apocalyptic number.

99855403 is a deficient number, since it is larger than the sum of its proper divisors (1).

99855403 is an equidigital number, since it uses as much as digits as its factorization.

99855403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 99855403 is about 9992.7675345722. The cubic root of 99855403 is about 463.9350555036.

The spelling of 99855403 in words is "ninety-nine million, eight hundred fifty-five thousand, four hundred three".