499571881 has 2 divisors, whose sum is σ = 499571882. Its totient is φ = 499571880.

The previous prime is 499571879. The next prime is 499571909. The reversal of 499571881 is 188175994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335219481 + 164352400 = 18309^2 + 12820^2 .

It is a cyclic number.

It is not a de Polignac number, because 499571881 - 2¹ = 499571879 is a prime.

It is a super-2 number, since 2×499571881² = 499144128571756322, which contains 22 as substring.

Together with 499571879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (499571801) 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, 249785940 + 249785941.

It is an arithmetic number, because the mean of its divisors is an integer number (249785941).

Almost surely, 2^499571881 is an apocalyptic number.

It is an amenable number.

499571881 is a deficient number, since it is larger than the sum of its proper divisors (1).

499571881 is an equidigital number, since it uses as much as digits as its factorization.

499571881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 52.

The square root of 499571881 is about 22351.1046930571. The cubic root of 499571881 is about 793.4739291145.

The spelling of 499571881 in words is "four hundred ninety-nine million, five hundred seventy-one thousand, eight hundred eighty-one".