212939964 has 18 divisors (see below), whose sum is σ = 538265000. Its totient is φ = 70979976.

The previous prime is 212939941. The next prime is 212939981. The reversal of 212939964 is 469939212.

It is a happy number.

212939964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2957464 + ... + 2957535.

Almost surely, 2^212939964 is an apocalyptic number.

It is an amenable number.

212939964 is an abundant number, since it is smaller than the sum of its proper divisors (325325036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212939964 is a wasteful number, since it uses less digits than its factorization.

212939964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5915009 (or 5915004 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 212939964 is about 14592.4625749049. The cubic root of 212939964 is about 597.1531470775.

The spelling of 212939964 in words is "two hundred twelve million, nine hundred thirty-nine thousand, nine hundred sixty-four".