511897469 has 2 divisors, whose sum is σ = 511897470. Its totient is φ = 511897468.

The previous prime is 511897439. The next prime is 511897541. The reversal of 511897469 is 964798115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359671225 + 152226244 = 18965^2 + 12338^2 .

It is a cyclic number.

It is not a de Polignac number, because 511897469 - 2²⁰ = 510848893 is a prime.

It is a super-2 number, since 2×511897469² = 524078037537211922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511897409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255948734 + 255948735.

It is an arithmetic number, because the mean of its divisors is an integer number (255948735).

Almost surely, 2^511897469 is an apocalyptic number.

It is an amenable number.

511897469 is a deficient number, since it is larger than the sum of its proper divisors (1).

511897469 is an equidigital number, since it uses as much as digits as its factorization.

511897469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 50.

The square root of 511897469 is about 22625.1512481132. The cubic root of 511897469 is about 799.9465948724.

The spelling of 511897469 in words is "five hundred eleven million, eight hundred ninety-seven thousand, four hundred sixty-nine".