212671867 has 4 divisors (see below), whose sum is σ = 212745736. Its totient is φ = 212598000.

The previous prime is 212671859. The next prime is 212671891. The reversal of 212671867 is 768176212.

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 212671867 - 2³ = 212671859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212671817) 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 3 ways as a sum of consecutive naturals, for example, 32433 + ... + 38434.

It is an arithmetic number, because the mean of its divisors is an integer number (53186434).

Almost surely, 2^212671867 is an apocalyptic number.

212671867 is a deficient number, since it is larger than the sum of its proper divisors (73869).

212671867 is an equidigital number, since it uses as much as digits as its factorization.

212671867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73868.

The product of its digits is 56448, while the sum is 40.

The square root of 212671867 is about 14583.2735351155. The cubic root of 212671867 is about 596.9024313371.

The spelling of 212671867 in words is "two hundred twelve million, six hundred seventy-one thousand, eight hundred sixty-seven".