99521471 has 4 divisors (see below), whose sum is σ = 113738832. Its totient is φ = 85304112.

The previous prime is 99521447. The next prime is 99521497. The reversal of 99521471 is 17412599.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99521471 - 2⁶ = 99521407 is a prime.

It is a super-3 number, since 3×99521471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99521441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7108670 + ... + 7108683.

It is an arithmetic number, because the mean of its divisors is an integer number (28434708).

Almost surely, 2^99521471 is an apocalyptic number.

99521471 is a deficient number, since it is larger than the sum of its proper divisors (14217361).

99521471 is a wasteful number, since it uses less digits than its factorization.

99521471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14217360.

The product of its digits is 22680, while the sum is 38.

The square root of 99521471 is about 9976.0448575575. The cubic root of 99521471 is about 463.4173209490.

The spelling of 99521471 in words is "ninety-nine million, five hundred twenty-one thousand, four hundred seventy-one".