211997029 has 2 divisors, whose sum is σ = 211997030. Its totient is φ = 211997028.

The previous prime is 211996999. The next prime is 211997033. The reversal of 211997029 is 920799112.

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., 168740100 + 43256929 = 12990^2 + 6577^2 .

It is a cyclic number.

It is not a de Polignac number, because 211997029 - 2⁵ = 211996997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211996982 and 211997000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211997629) 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, 105998514 + 105998515.

It is an arithmetic number, because the mean of its divisors is an integer number (105998515).

Almost surely, 2^211997029 is an apocalyptic number.

It is an amenable number.

211997029 is a deficient number, since it is larger than the sum of its proper divisors (1).

211997029 is an equidigital number, since it uses as much as digits as its factorization.

211997029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 211997029 is about 14560.1177536447. The cubic root of 211997029 is about 596.2704103405.

The spelling of 211997029 in words is "two hundred eleven million, nine hundred ninety-seven thousand, twenty-nine".