212434399 has 2 divisors, whose sum is σ = 212434400. Its totient is φ = 212434398.

The previous prime is 212434381. The next prime is 212434403. The reversal of 212434399 is 993434212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212434399 - 2²³ = 204045791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212434349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106217199 + 106217200.

It is an arithmetic number, because the mean of its divisors is an integer number (106217200).

Almost surely, 2^212434399 is an apocalyptic number.

212434399 is a deficient number, since it is larger than the sum of its proper divisors (1).

212434399 is an equidigital number, since it uses as much as digits as its factorization.

212434399 is an odious number, because the sum of its binary digits is odd.

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

The square root of 212434399 is about 14575.1294676926. The cubic root of 212434399 is about 596.6801828272.

The spelling of 212434399 in words is "two hundred twelve million, four hundred thirty-four thousand, three hundred ninety-nine".