99174221 has 4 divisors (see below), whose sum is σ = 100855200. Its totient is φ = 97493244.

The previous prime is 99174199. The next prime is 99174241. The reversal of 99174221 is 12247199.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99174221 - 2²⁶ = 32065357 is a prime.

It is a super-2 number, since 2×99174221² = 19671052221913682, 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 (99174241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840401 + ... + 840518.

It is an arithmetic number, because the mean of its divisors is an integer number (25213800).

Almost surely, 2^99174221 is an apocalyptic number.

It is an amenable number.

99174221 is a deficient number, since it is larger than the sum of its proper divisors (1680979).

99174221 is a wasteful number, since it uses less digits than its factorization.

99174221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680978.

The product of its digits is 9072, while the sum is 35.

The square root of 99174221 is about 9958.6254573611. The cubic root of 99174221 is about 462.8777081091.

The spelling of 99174221 in words is "ninety-nine million, one hundred seventy-four thousand, two hundred twenty-one".