512869897 has 2 divisors, whose sum is σ = 512869898. Its totient is φ = 512869896.

The previous prime is 512869891. The next prime is 512869909. The reversal of 512869897 is 798968215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311910921 + 200958976 = 17661^2 + 14176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-512869897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (512869891) 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, 256434948 + 256434949.

It is an arithmetic number, because the mean of its divisors is an integer number (256434949).

Almost surely, 2^512869897 is an apocalyptic number.

It is an amenable number.

512869897 is a deficient number, since it is larger than the sum of its proper divisors (1).

512869897 is an equidigital number, since it uses as much as digits as its factorization.

512869897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 55.

The square root of 512869897 is about 22646.6310298022. The cubic root of 512869897 is about 800.4528150040.

The spelling of 512869897 in words is "five hundred twelve million, eight hundred sixty-nine thousand, eight hundred ninety-seven".