212064091 has 2 divisors, whose sum is σ = 212064092. Its totient is φ = 212064090.

The previous prime is 212064079. The next prime is 212064107. The reversal of 212064091 is 190460212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212064091 - 2²⁵ = 178509659 is a prime.

It is a super-3 number, since 3×212064091³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (212064011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106032045 + 106032046.

It is an arithmetic number, because the mean of its divisors is an integer number (106032046).

Almost surely, 2^212064091 is an apocalyptic number.

212064091 is a deficient number, since it is larger than the sum of its proper divisors (1).

212064091 is an equidigital number, since it uses as much as digits as its factorization.

212064091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 212064091 is about 14562.4205062208. The cubic root of 212064091 is about 596.3332773702. Note that the first 3 decimals are identical.

The spelling of 212064091 in words is "two hundred twelve million, sixty-four thousand, ninety-one".