212998757 has 2 divisors, whose sum is σ = 212998758. Its totient is φ = 212998756.

The previous prime is 212998739. The next prime is 212998777. The reversal of 212998757 is 757899212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158105476 + 54893281 = 12574^2 + 7409^2 .

It is a cyclic number.

It is not a de Polignac number, because 212998757 - 2⁶ = 212998693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212998727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106499378 + 106499379.

It is an arithmetic number, because the mean of its divisors is an integer number (106499379).

Almost surely, 2^212998757 is an apocalyptic number.

It is an amenable number.

212998757 is a deficient number, since it is larger than the sum of its proper divisors (1).

212998757 is an equidigital number, since it uses as much as digits as its factorization.

212998757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 50.

The square root of 212998757 is about 14594.4769347860. The cubic root of 212998757 is about 597.2081002728.

The spelling of 212998757 in words is "two hundred twelve million, nine hundred ninety-eight thousand, seven hundred fifty-seven".