214789687 has 16 divisors (see below), whose sum is σ = 256326400. Its totient is φ = 179811576.

The previous prime is 214789681. The next prime is 214789721. The reversal of 214789687 is 786987412.

It is a de Polignac number, because none of the positive numbers 2^k-214789687 is a prime.

It is a super-2 number, since 2×214789687² = 92269219283115938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214789681) 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 15 ways as a sum of consecutive naturals, for example, 7468 + ... + 22030.

It is an arithmetic number, because the mean of its divisors is an integer number (16020400).

Almost surely, 2^214789687 is an apocalyptic number.

214789687 is a deficient number, since it is larger than the sum of its proper divisors (41536713).

214789687 is an equidigital number, since it uses as much as digits as its factorization.

214789687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14627 (or 14613 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 52.

The square root of 214789687 is about 14655.7049301629. The cubic root of 214789687 is about 598.8772401425.

The spelling of 214789687 in words is "two hundred fourteen million, seven hundred eighty-nine thousand, six hundred eighty-seven".