214369987 has 4 divisors (see below), whose sum is σ = 230860000. Its totient is φ = 197879976.

The previous prime is 214369979. The next prime is 214369997. The reversal of 214369987 is 789963412.

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 214369987 - 2³ = 214369979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 214369987.

It is not an unprimeable number, because it can be changed into a prime (214369907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8244987 + ... + 8245012.

It is an arithmetic number, because the mean of its divisors is an integer number (57715000).

Almost surely, 2^214369987 is an apocalyptic number.

214369987 is a deficient number, since it is larger than the sum of its proper divisors (16490013).

214369987 is a wasteful number, since it uses less digits than its factorization.

214369987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16490012.

The product of its digits is 653184, while the sum is 49.

The square root of 214369987 is about 14641.3792724593. The cubic root of 214369987 is about 598.4869162069.

The spelling of 214369987 in words is "two hundred fourteen million, three hundred sixty-nine thousand, nine hundred eighty-seven".