212432897 has 2 divisors, whose sum is σ = 212432898. Its totient is φ = 212432896.

The previous prime is 212432893. The next prime is 212432933. The reversal of 212432897 is 798234212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188265841 + 24167056 = 13721^2 + 4916^2 .

It is a cyclic number.

It is not a de Polignac number, because 212432897 - 2² = 212432893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212432897.

It is not a weakly prime, because it can be changed into another prime (212432893) 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, 106216448 + 106216449.

It is an arithmetic number, because the mean of its divisors is an integer number (106216449).

Almost surely, 2^212432897 is an apocalyptic number.

It is an amenable number.

212432897 is a deficient number, since it is larger than the sum of its proper divisors (1).

212432897 is an equidigital number, since it uses as much as digits as its factorization.

212432897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 212432897 is about 14575.0779414726. The cubic root of 212432897 is about 596.6787765645.

The spelling of 212432897 in words is "two hundred twelve million, four hundred thirty-two thousand, eight hundred ninety-seven".