212918749 has 2 divisors, whose sum is σ = 212918750. Its totient is φ = 212918748.

The previous prime is 212918723. The next prime is 212918753. The reversal of 212918749 is 947819212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207878724 + 5040025 = 14418^2 + 2245^2 .

It is a cyclic number.

It is not a de Polignac number, because 212918749 - 2²³ = 204530141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212918449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106459374 + 106459375.

It is an arithmetic number, because the mean of its divisors is an integer number (106459375).

Almost surely, 2^212918749 is an apocalyptic number.

It is an amenable number.

212918749 is a deficient number, since it is larger than the sum of its proper divisors (1).

212918749 is an equidigital number, since it uses as much as digits as its factorization.

212918749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 212918749 is about 14591.7356404233. The cubic root of 212918749 is about 597.1333151579.

The spelling of 212918749 in words is "two hundred twelve million, nine hundred eighteen thousand, seven hundred forty-nine".