499521871 has 2 divisors, whose sum is σ = 499521872. Its totient is φ = 499521870.

The previous prime is 499521859. The next prime is 499521923. The reversal of 499521871 is 178125994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 499521871 - 2²³ = 491133263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499521271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249760935 + 249760936.

It is an arithmetic number, because the mean of its divisors is an integer number (249760936).

Almost surely, 2^499521871 is an apocalyptic number.

499521871 is a deficient number, since it is larger than the sum of its proper divisors (1).

499521871 is an equidigital number, since it uses as much as digits as its factorization.

499521871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 46.

The square root of 499521871 is about 22349.9859284072. The cubic root of 499521871 is about 793.4474511395.

The spelling of 499521871 in words is "four hundred ninety-nine million, five hundred twenty-one thousand, eight hundred seventy-one".