214191917 has 4 divisors (see below), whose sum is σ = 214275900. Its totient is φ = 214107936.

The previous prime is 214191881. The next prime is 214191947. The reversal of 214191917 is 719191412.

214191917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13147876 + 201044041 = 3626^2 + 14179^2 .

It is a cyclic number.

It is not a de Polignac number, because 214191917 - 2¹² = 214187821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214191947) 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, 38042 + ... + 43307.

It is an arithmetic number, because the mean of its divisors is an integer number (53568975).

Almost surely, 2^214191917 is an apocalyptic number.

It is an amenable number.

214191917 is a deficient number, since it is larger than the sum of its proper divisors (83983).

214191917 is an equidigital number, since it uses as much as digits as its factorization.

214191917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83982.

The product of its digits is 4536, while the sum is 35.

The square root of 214191917 is about 14635.2969563313. The cubic root of 214191917 is about 598.3211559264.

The spelling of 214191917 in words is "two hundred fourteen million, one hundred ninety-one thousand, nine hundred seventeen".