511897 has 2 divisors, whose sum is σ = 511898. Its totient is φ = 511896.

The previous prime is 511891. The next prime is 511909. The reversal of 511897 is 798115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502681 + 9216 = 709^2 + 96^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511897 is a prime.

It is a Chen prime.

511897 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (511891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255948 + 255949.

It is an arithmetic number, because the mean of its divisors is an integer number (255949).

2⁵¹¹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

511897 is a deficient number, since it is larger than the sum of its proper divisors (1).

511897 is an equidigital number, since it uses as much as digits as its factorization.

511897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 31.

The square root of 511897 is about 715.4697757418. The cubic root of 511897 is about 79.9946350569.

The spelling of 511897 in words is "five hundred eleven thousand, eight hundred ninety-seven".