91414221 has 4 divisors (see below), whose sum is σ = 121885632. Its totient is φ = 60942812.

The previous prime is 91414199. The next prime is 91414223. The reversal of 91414221 is 12241419.

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 91414221 - 2⁵ = 91414189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91414191 and 91414200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91414223) 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, 15235701 + ... + 15235706.

It is an arithmetic number, because the mean of its divisors is an integer number (30471408).

Almost surely, 2^91414221 is an apocalyptic number.

It is an amenable number.

91414221 is a deficient number, since it is larger than the sum of its proper divisors (30471411).

91414221 is a wasteful number, since it uses less digits than its factorization.

91414221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30471410.

The product of its digits is 576, while the sum is 24.

The square root of 91414221 is about 9561.0784433556. The cubic root of 91414221 is about 450.4755811570.

The spelling of 91414221 in words is "ninety-one million, four hundred fourteen thousand, two hundred twenty-one".