213987887 has 2 divisors, whose sum is σ = 213987888. Its totient is φ = 213987886.

The previous prime is 213987847. The next prime is 213987911. The reversal of 213987887 is 788789312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213987887 - 2¹⁰ = 213986863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213987847) 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 as a sum of consecutive naturals, namely, 106993943 + 106993944.

It is an arithmetic number, because the mean of its divisors is an integer number (106993944).

Almost surely, 2^213987887 is an apocalyptic number.

213987887 is a deficient number, since it is larger than the sum of its proper divisors (1).

213987887 is an equidigital number, since it uses as much as digits as its factorization.

213987887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 53.

The square root of 213987887 is about 14628.3248186523. The cubic root of 213987887 is about 598.1311172468.

The spelling of 213987887 in words is "two hundred thirteen million, nine hundred eighty-seven thousand, eight hundred eighty-seven".