214406891 has 2 divisors, whose sum is σ = 214406892. Its totient is φ = 214406890.

The previous prime is 214406879. The next prime is 214406923. The reversal of 214406891 is 198604412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 214406891 - 2²⁶ = 147298027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (214409891) 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 as a sum of consecutive naturals, namely, 107203445 + 107203446.

It is an arithmetic number, because the mean of its divisors is an integer number (107203446).

Almost surely, 2^214406891 is an apocalyptic number.

214406891 is a deficient number, since it is larger than the sum of its proper divisors (1).

214406891 is an equidigital number, since it uses as much as digits as its factorization.

214406891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 214406891 is about 14642.6394820060. The cubic root of 214406891 is about 598.5212576030.

The spelling of 214406891 in words is "two hundred fourteen million, four hundred six thousand, eight hundred ninety-one".