214388691 has 8 divisors (see below), whose sum is σ = 311838144. Its totient is φ = 129932520.

The previous prime is 214388687. The next prime is 214388719. The reversal of 214388691 is 196883412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 214388691 - 2² = 214388687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (214388641) 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 7 ways as a sum of consecutive naturals, for example, 3248281 + ... + 3248346.

It is an arithmetic number, because the mean of its divisors is an integer number (38979768).

Almost surely, 2^214388691 is an apocalyptic number.

214388691 is a deficient number, since it is larger than the sum of its proper divisors (97449453).

214388691 is a wasteful number, since it uses less digits than its factorization.

214388691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6496641.

The product of its digits is 82944, while the sum is 42.

The square root of 214388691 is about 14642.0179961643. The cubic root of 214388691 is about 598.5043218987.

The spelling of 214388691 in words is "two hundred fourteen million, three hundred eighty-eight thousand, six hundred ninety-one".