214390391 has 4 divisors (see below), whose sum is σ = 214467000. Its totient is φ = 214313784.

The previous prime is 214390387. The next prime is 214390399. The reversal of 214390391 is 193093412.

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 214390391 - 2² = 214390387 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 (214390399) 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, 33941 + ... + 39758.

It is an arithmetic number, because the mean of its divisors is an integer number (53616750).

Almost surely, 2^214390391 is an apocalyptic number.

214390391 is a deficient number, since it is larger than the sum of its proper divisors (76609).

214390391 is an equidigital number, since it uses as much as digits as its factorization.

214390391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76608.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 214390391 is about 14642.0760481566. The cubic root of 214390391 is about 598.5059038457.

The spelling of 214390391 in words is "two hundred fourteen million, three hundred ninety thousand, three hundred ninety-one".