212099729 has 2 divisors, whose sum is σ = 212099730. Its totient is φ = 212099728.

The previous prime is 212099711. The next prime is 212099743. The reversal of 212099729 is 927990212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178169104 + 33930625 = 13348^2 + 5825^2 .

It is a cyclic number.

It is not a de Polignac number, because 212099729 - 2²⁴ = 195322513 is a prime.

It is not a weakly prime, because it can be changed into another prime (212099759) 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, 106049864 + 106049865.

It is an arithmetic number, because the mean of its divisors is an integer number (106049865).

Almost surely, 2^212099729 is an apocalyptic number.

It is an amenable number.

212099729 is a deficient number, since it is larger than the sum of its proper divisors (1).

212099729 is an equidigital number, since it uses as much as digits as its factorization.

212099729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 212099729 is about 14563.6440838136. The cubic root of 212099729 is about 596.3666806916.

The spelling of 212099729 in words is "two hundred twelve million, ninety-nine thousand, seven hundred twenty-nine".