212387939 has 2 divisors, whose sum is σ = 212387940. Its totient is φ = 212387938.

The previous prime is 212387927. The next prime is 212387941. The reversal of 212387939 is 939783212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212387939 - 2⁸ = 212387683 is a prime.

Together with 212387941, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212387939.

It is not a weakly prime, because it can be changed into another prime (212387639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106193969 + 106193970.

It is an arithmetic number, because the mean of its divisors is an integer number (106193970).

Almost surely, 2^212387939 is an apocalyptic number.

212387939 is a deficient number, since it is larger than the sum of its proper divisors (1).

212387939 is an equidigital number, since it uses as much as digits as its factorization.

212387939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 212387939 is about 14573.5355696550. The cubic root of 212387939 is about 596.6366811115.

The spelling of 212387939 in words is "two hundred twelve million, three hundred eighty-seven thousand, nine hundred thirty-nine".