212871693 has 32 divisors (see below), whose sum is σ = 306432000. Its totient is φ = 131098176.

The previous prime is 212871679. The next prime is 212871697. The reversal of 212871693 is 396178212.

It is not a de Polignac number, because 212871693 - 2⁸ = 212871437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212871697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 507838 + ... + 508256.

It is an arithmetic number, because the mean of its divisors is an integer number (9576000).

Almost surely, 2^212871693 is an apocalyptic number.

212871693 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

212871693 is a deficient number, since it is larger than the sum of its proper divisors (93560307).

212871693 is a wasteful number, since it uses less digits than its factorization.

212871693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681.

The product of its digits is 36288, while the sum is 39.

The square root of 212871693 is about 14590.1231317628. The cubic root of 212871693 is about 597.0893222018.

The spelling of 212871693 in words is "two hundred twelve million, eight hundred seventy-one thousand, six hundred ninety-three".