212913887 has 2 divisors, whose sum is σ = 212913888. Its totient is φ = 212913886.

The previous prime is 212913871. The next prime is 212913893. The reversal of 212913887 is 788319212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212913887 - 2⁴ = 212913871 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 (212913817) 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 as a sum of consecutive naturals, namely, 106456943 + 106456944.

It is an arithmetic number, because the mean of its divisors is an integer number (106456944).

Almost surely, 2^212913887 is an apocalyptic number.

212913887 is a deficient number, since it is larger than the sum of its proper divisors (1).

212913887 is an equidigital number, since it uses as much as digits as its factorization.

212913887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 212913887 is about 14591.5690383180. The cubic root of 212913887 is about 597.1287699432.

The spelling of 212913887 in words is "two hundred twelve million, nine hundred thirteen thousand, eight hundred eighty-seven".