511423669 has 2 divisors, whose sum is σ = 511423670. Its totient is φ = 511423668.

The previous prime is 511423651. The next prime is 511423681. The reversal of 511423669 is 966324115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 451562500 + 59861169 = 21250^2 + 7737^2 .

It is a cyclic number.

It is not a de Polignac number, because 511423669 - 2⁷ = 511423541 is a prime.

It is a super-2 number, since 2×511423669² = 523108338426843122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511423369) 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, 255711834 + 255711835.

It is an arithmetic number, because the mean of its divisors is an integer number (255711835).

Almost surely, 2^511423669 is an apocalyptic number.

It is an amenable number.

511423669 is a deficient number, since it is larger than the sum of its proper divisors (1).

511423669 is an equidigital number, since it uses as much as digits as its factorization.

511423669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 511423669 is about 22614.6781759104. The cubic root of 511423669 is about 799.6997149043.

The spelling of 511423669 in words is "five hundred eleven million, four hundred twenty-three thousand, six hundred sixty-nine".