500859881 has 2 divisors, whose sum is σ = 500859882. Its totient is φ = 500859880.

The previous prime is 500859859. The next prime is 500859883. The reversal of 500859881 is 188958005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 497691481 + 3168400 = 22309^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 500859881 - 2¹⁰ = 500858857 is a prime.

It is a super-2 number, since 2×500859881² = 501721240790668322, which contains 22 as substring.

Together with 500859883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (500859883) 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, 250429940 + 250429941.

It is an arithmetic number, because the mean of its divisors is an integer number (250429941).

Almost surely, 2^500859881 is an apocalyptic number.

It is an amenable number.

500859881 is a deficient number, since it is larger than the sum of its proper divisors (1).

500859881 is an equidigital number, since it uses as much as digits as its factorization.

500859881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 44.

The square root of 500859881 is about 22379.8990390931. The cubic root of 500859881 is about 794.1552574084.

The spelling of 500859881 in words is "five hundred million, eight hundred fifty-nine thousand, eight hundred eighty-one".