212797657 has 2 divisors, whose sum is σ = 212797658. Its totient is φ = 212797656.

The previous prime is 212797649. The next prime is 212797699. The reversal of 212797657 is 756797212.

212797657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206094736 + 6702921 = 14356^2 + 2589^2 .

It is a cyclic number.

It is not a de Polignac number, because 212797657 - 2³ = 212797649 is a prime.

It is not a weakly prime, because it can be changed into another prime (212717657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106398828 + 106398829.

It is an arithmetic number, because the mean of its divisors is an integer number (106398829).

Almost surely, 2^212797657 is an apocalyptic number.

It is an amenable number.

212797657 is a deficient number, since it is larger than the sum of its proper divisors (1).

212797657 is an equidigital number, since it uses as much as digits as its factorization.

212797657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 46.

The square root of 212797657 is about 14587.5857152580. The cubic root of 212797657 is about 597.0200923442.

The spelling of 212797657 in words is "two hundred twelve million, seven hundred ninety-seven thousand, six hundred fifty-seven".