216592897 has 2 divisors, whose sum is σ = 216592898. Its totient is φ = 216592896.

The previous prime is 216592891. The next prime is 216592921. The reversal of 216592897 is 798295612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215032896 + 1560001 = 14664^2 + 1249^2 .

It is a cyclic number.

It is not a de Polignac number, because 216592897 - 2⁷ = 216592769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216592897.

It is not a weakly prime, because it can be changed into another prime (216592891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108296448 + 108296449.

It is an arithmetic number, because the mean of its divisors is an integer number (108296449).

Almost surely, 2^216592897 is an apocalyptic number.

It is an amenable number.

216592897 is a deficient number, since it is larger than the sum of its proper divisors (1).

216592897 is an equidigital number, since it uses as much as digits as its factorization.

216592897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The square root of 216592897 is about 14717.0953995685. The cubic root of 216592897 is about 600.5484771722.

The spelling of 216592897 in words is "two hundred sixteen million, five hundred ninety-two thousand, eight hundred ninety-seven".