512409889 has 2 divisors, whose sum is σ = 512409890. Its totient is φ = 512409888.

The previous prime is 512409871. The next prime is 512409899. The reversal of 512409889 is 988904215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 511121664 + 1288225 = 22608^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 512409889 - 2⁵ = 512409857 is a prime.

It is not a weakly prime, because it can be changed into another prime (512409899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256204944 + 256204945.

It is an arithmetic number, because the mean of its divisors is an integer number (256204945).

Almost surely, 2^512409889 is an apocalyptic number.

It is an amenable number.

512409889 is a deficient number, since it is larger than the sum of its proper divisors (1).

512409889 is an equidigital number, since it uses as much as digits as its factorization.

512409889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 512409889 is about 22636.4725388034. The cubic root of 512409889 is about 800.2134269103.

The spelling of 512409889 in words is "five hundred twelve million, four hundred nine thousand, eight hundred eighty-nine".