499561871 has 2 divisors, whose sum is σ = 499561872. Its totient is φ = 499561870.

The previous prime is 499561861. The next prime is 499561891. The reversal of 499561871 is 178165994.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499561871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499561841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249780935 + 249780936.

It is an arithmetic number, because the mean of its divisors is an integer number (249780936).

Almost surely, 2^499561871 is an apocalyptic number.

499561871 is a deficient number, since it is larger than the sum of its proper divisors (1).

499561871 is an equidigital number, since it uses as much as digits as its factorization.

499561871 is an evil number, because the sum of its binary digits is even.

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

The square root of 499561871 is about 22350.8807656432. The cubic root of 499561871 is about 793.4686294253.

It can be divided in two parts, 4995 and 61871, that added together give a palindrome (66866).

The spelling of 499561871 in words is "four hundred ninety-nine million, five hundred sixty-one thousand, eight hundred seventy-one".