212990017 has 2 divisors, whose sum is σ = 212990018. Its totient is φ = 212990016.

The previous prime is 212990003. The next prime is 212990023. The reversal of 212990017 is 710099212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174002481 + 38987536 = 13191^2 + 6244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212990017 is a prime.

It is not a weakly prime, because it can be changed into another prime (212990047) 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, 106495008 + 106495009.

It is an arithmetic number, because the mean of its divisors is an integer number (106495009).

Almost surely, 2^212990017 is an apocalyptic number.

It is an amenable number.

212990017 is a deficient number, since it is larger than the sum of its proper divisors (1).

212990017 is an equidigital number, since it uses as much as digits as its factorization.

212990017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 212990017 is about 14594.1775033744. The cubic root of 212990017 is about 597.1999317272.

The spelling of 212990017 in words is "two hundred twelve million, nine hundred ninety thousand, seventeen".