506631869 has 2 divisors, whose sum is σ = 506631870. Its totient is φ = 506631868.

The previous prime is 506631863. The next prime is 506631871. The reversal of 506631869 is 968136605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262116100 + 244515769 = 16190^2 + 15637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506631869 is a prime.

It is a super-2 number, since 2×506631869² = 513351701372866322, which contains 22 as substring.

Together with 506631871, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_26686394 and since 506631869 and 26686394 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506631863) 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, 253315934 + 253315935.

It is an arithmetic number, because the mean of its divisors is an integer number (253315935).

Almost surely, 2^506631869 is an apocalyptic number.

It is an amenable number.

506631869 is a deficient number, since it is larger than the sum of its proper divisors (1).

506631869 is an equidigital number, since it uses as much as digits as its factorization.

506631869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 506631869 is about 22508.4843781184. The cubic root of 506631869 is about 797.1942697886.

The spelling of 506631869 in words is "five hundred six million, six hundred thirty-one thousand, eight hundred sixty-nine".