211938469 has 2 divisors, whose sum is σ = 211938470. Its totient is φ = 211938468.

The previous prime is 211938457. The next prime is 211938497. The reversal of 211938469 is 964839112.

It is a happy number.

211938469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145515969 + 66422500 = 12063^2 + 8150^2 .

It is a cyclic number.

It is not a de Polignac number, because 211938469 - 2⁷ = 211938341 is a prime.

It is a super-2 number, since 2×211938469² = 89835829284127922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211938449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105969234 + 105969235.

It is an arithmetic number, because the mean of its divisors is an integer number (105969235).

Almost surely, 2^211938469 is an apocalyptic number.

It is an amenable number.

211938469 is a deficient number, since it is larger than the sum of its proper divisors (1).

211938469 is an equidigital number, since it uses as much as digits as its factorization.

211938469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 43.

The square root of 211938469 is about 14558.1066420053. The cubic root of 211938469 is about 596.2155026358.

The spelling of 211938469 in words is "two hundred eleven million, nine hundred thirty-eight thousand, four hundred sixty-nine".