512394991 has 2 divisors, whose sum is σ = 512394992. Its totient is φ = 512394990.

The previous prime is 512394931. The next prime is 512395049. The reversal of 512394991 is 199493215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 512394991 - 2⁷ = 512394863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512394931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256197495 + 256197496.

It is an arithmetic number, because the mean of its divisors is an integer number (256197496).

Almost surely, 2^512394991 is an apocalyptic number.

512394991 is a deficient number, since it is larger than the sum of its proper divisors (1).

512394991 is an equidigital number, since it uses as much as digits as its factorization.

512394991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 43.

The square root of 512394991 is about 22636.1434657055. The cubic root of 512394991 is about 800.2056715986.

The spelling of 512394991 in words is "five hundred twelve million, three hundred ninety-four thousand, nine hundred ninety-one".