212239369 has 2 divisors, whose sum is σ = 212239370. Its totient is φ = 212239368.

The previous prime is 212239337. The next prime is 212239381. The reversal of 212239369 is 963932212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210830400 + 1408969 = 14520^2 + 1187^2 .

It is a cyclic number.

It is not a de Polignac number, because 212239369 - 2⁵ = 212239337 is a prime.

It is a super-2 number, since 2×212239369² = 90091099507036322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212239309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106119684 + 106119685.

It is an arithmetic number, because the mean of its divisors is an integer number (106119685).

Almost surely, 2^212239369 is an apocalyptic number.

It is an amenable number.

212239369 is a deficient number, since it is larger than the sum of its proper divisors (1).

212239369 is an equidigital number, since it uses as much as digits as its factorization.

212239369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 37.

The square root of 212239369 is about 14568.4374247892. The cubic root of 212239369 is about 596.4975285318.

The spelling of 212239369 in words is "two hundred twelve million, two hundred thirty-nine thousand, three hundred sixty-nine".