212434939 has 4 divisors (see below), whose sum is σ = 212477224. Its totient is φ = 212392656.

The previous prime is 212434933. The next prime is 212434961. The reversal of 212434939 is 939434212.

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

It is a cyclic number.

It is not a de Polignac number, because 212434939 - 2⁷ = 212434811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212434898 and 212434907.

It is not an unprimeable number, because it can be changed into a prime (212434933) 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, 12402 + ... + 24055.

It is an arithmetic number, because the mean of its divisors is an integer number (53119306).

Almost surely, 2^212434939 is an apocalyptic number.

212434939 is a deficient number, since it is larger than the sum of its proper divisors (42285).

212434939 is an equidigital number, since it uses as much as digits as its factorization.

212434939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42284.

The product of its digits is 46656, while the sum is 37.

The square root of 212434939 is about 14575.1479923876. The cubic root of 212434939 is about 596.6806884061.

The spelling of 212434939 in words is "two hundred twelve million, four hundred thirty-four thousand, nine hundred thirty-nine".