214993091 has 4 divisors (see below), whose sum is σ = 221928384. Its totient is φ = 208057800.

The previous prime is 214993081. The next prime is 214993099. The reversal of 214993091 is 190399412.

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 214993091 - 2⁶ = 214993027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214993099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3467600 + ... + 3467661.

It is an arithmetic number, because the mean of its divisors is an integer number (55482096).

Almost surely, 2^214993091 is an apocalyptic number.

214993091 is a deficient number, since it is larger than the sum of its proper divisors (6935293).

214993091 is an equidigital number, since it uses as much as digits as its factorization.

214993091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6935292.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 214993091 is about 14662.6427017779. The cubic root of 214993091 is about 599.0662243775.

The spelling of 214993091 in words is "two hundred fourteen million, nine hundred ninety-three thousand, ninety-one".