212978941 has 24 divisors (see below), whose sum is σ = 264067776. Its totient is φ = 170674560.

The previous prime is 212978939. The next prime is 212978951. The reversal of 212978941 is 149879212.

It is a happy number.

It is not a de Polignac number, because 212978941 - 2¹ = 212978939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212978951) 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 23 ways as a sum of consecutive naturals, for example, 138346 + ... + 139876.

It is an arithmetic number, because the mean of its divisors is an integer number (11002824).

Almost surely, 2^212978941 is an apocalyptic number.

It is an amenable number.

212978941 is a deficient number, since it is larger than the sum of its proper divisors (51088835).

212978941 is a wasteful number, since it uses less digits than its factorization.

212978941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729 (or 1722 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 212978941 is about 14593.7980320409. The cubic root of 212978941 is about 597.1895795971.

The spelling of 212978941 in words is "two hundred twelve million, nine hundred seventy-eight thousand, nine hundred forty-one".