212890633 has 2 divisors, whose sum is σ = 212890634. Its totient is φ = 212890632.

The previous prime is 212890631. The next prime is 212890669. The reversal of 212890633 is 336098212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111344704 + 101545929 = 10552^2 + 10077^2 .

It is a cyclic number.

It is not a de Polignac number, because 212890633 - 2¹ = 212890631 is a prime.

Together with 212890631, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212890631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106445316 + 106445317.

It is an arithmetic number, because the mean of its divisors is an integer number (106445317).

Almost surely, 2^212890633 is an apocalyptic number.

It is an amenable number.

212890633 is a deficient number, since it is larger than the sum of its proper divisors (1).

212890633 is an equidigital number, since it uses as much as digits as its factorization.

212890633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 212890633 is about 14590.7721865568. The cubic root of 212890633 is about 597.1070301087.

The spelling of 212890633 in words is "two hundred twelve million, eight hundred ninety thousand, six hundred thirty-three".