99735221 has 4 divisors (see below), whose sum is σ = 99758700. Its totient is φ = 99711744.

The previous prime is 99735211. The next prime is 99735227. The reversal of 99735221 is 12253799.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30096196 + 69639025 = 5486^2 + 8345^2 .

It is a cyclic number.

It is not a de Polignac number, because 99735221 - 2¹⁴ = 99718837 is a prime.

It is a super-2 number, since 2×99735221² = 19894228615837682, which contains 22 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 (99735227) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3386 + ... + 14523.

It is an arithmetic number, because the mean of its divisors is an integer number (24939675).

Almost surely, 2^99735221 is an apocalyptic number.

It is an amenable number.

99735221 is a deficient number, since it is larger than the sum of its proper divisors (23479).

99735221 is a wasteful number, since it uses less digits than its factorization.

99735221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23478.

The product of its digits is 34020, while the sum is 38.

The square root of 99735221 is about 9986.7522748890. The cubic root of 99735221 is about 463.7488561762.

The spelling of 99735221 in words is "ninety-nine million, seven hundred thirty-five thousand, two hundred twenty-one".