212438739 has 4 divisors (see below), whose sum is σ = 283251656. Its totient is φ = 141625824.

The previous prime is 212438683. The next prime is 212438747. The reversal of 212438739 is 937834212.

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

It is not a de Polignac number, because 212438739 - 2⁸ = 212438483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212438697 and 212438706.

It is not an unprimeable number, because it can be changed into a prime (212238739) 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, 35406454 + ... + 35406459.

It is an arithmetic number, because the mean of its divisors is an integer number (70812914).

Almost surely, 2^212438739 is an apocalyptic number.

212438739 is a deficient number, since it is larger than the sum of its proper divisors (70812917).

212438739 is an equidigital number, since it uses as much as digits as its factorization.

212438739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70812916.

The product of its digits is 72576, while the sum is 39.

The square root of 212438739 is about 14575.2783506868. The cubic root of 212438739 is about 596.6842461591.

The spelling of 212438739 in words is "two hundred twelve million, four hundred thirty-eight thousand, seven hundred thirty-nine".