212975678 has 4 divisors (see below), whose sum is σ = 319463520. Its totient is φ = 106487838.

The previous prime is 212975657. The next prime is 212975729. The reversal of 212975678 is 876579212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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, 53243918 + ... + 53243921.

It is an arithmetic number, because the mean of its divisors is an integer number (79865880).

Almost surely, 2^212975678 is an apocalyptic number.

212975678 is a deficient number, since it is larger than the sum of its proper divisors (106487842).

212975678 is a wasteful number, since it uses less digits than its factorization.

212975678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106487841.

The product of its digits is 423360, while the sum is 47.

The square root of 212975678 is about 14593.6862375481. The cubic root of 212975678 is about 597.1865297814.

The spelling of 212975678 in words is "two hundred twelve million, nine hundred seventy-five thousand, six hundred seventy-eight".