212786873 has 4 divisors (see below), whose sum is σ = 229155108. Its totient is φ = 196418640.

The previous prime is 212786867. The next prime is 212786879. The reversal of 212786873 is 378687212.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (212786867) and next prime (212786879).

It can be written as a sum of positive squares in 2 ways, for example, as 42667024 + 170119849 = 6532^2 + 13043^2 .

It is a cyclic number.

It is not a de Polignac number, because 212786873 - 2⁸ = 212786617 is a prime.

It is a super-2 number, since 2×212786873² = 90556506642236258, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212786879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8184098 + ... + 8184123.

It is an arithmetic number, because the mean of its divisors is an integer number (57288777).

Almost surely, 2^212786873 is an apocalyptic number.

It is an amenable number.

212786873 is a deficient number, since it is larger than the sum of its proper divisors (16368235).

212786873 is a wasteful number, since it uses less digits than its factorization.

212786873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16368234.

The product of its digits is 225792, while the sum is 44.

The square root of 212786873 is about 14587.2160812130. The cubic root of 212786873 is about 597.0100070618.

The spelling of 212786873 in words is "two hundred twelve million, seven hundred eighty-six thousand, eight hundred seventy-three".