99884421 has 48 divisors (see below), whose sum is σ = 184189824. Its totient is φ = 52674624.

The previous prime is 99884417. The next prime is 99884437. The reversal of 99884421 is 12448899.

It is not a de Polignac number, because 99884421 - 2² = 99884417 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99884461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19855 + ... + 24371.

It is an arithmetic number, because the mean of its divisors is an integer number (3837288).

Almost surely, 2^99884421 is an apocalyptic number.

99884421 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

99884421 is a deficient number, since it is larger than the sum of its proper divisors (84305403).

99884421 is a wasteful number, since it uses less digits than its factorization.

99884421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552 (or 4540 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 99884421 is about 9994.2193792212. The cubic root of 99884421 is about 463.9799910243.

The spelling of 99884421 in words is "ninety-nine million, eight hundred eighty-four thousand, four hundred twenty-one".