500129891 has 2 divisors, whose sum is σ = 500129892. Its totient is φ = 500129890.

The previous prime is 500129879. The next prime is 500129899. The reversal of 500129891 is 198921005.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 500129891 - 2⁶ = 500129827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (500129899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250064945 + 250064946.

It is an arithmetic number, because the mean of its divisors is an integer number (250064946).

Almost surely, 2^500129891 is an apocalyptic number.

500129891 is a deficient number, since it is larger than the sum of its proper divisors (1).

500129891 is an equidigital number, since it uses as much as digits as its factorization.

500129891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 500129891 is about 22363.5840374480. The cubic root of 500129891 is about 793.7692497367.

The spelling of 500129891 in words is "five hundred million, one hundred twenty-nine thousand, eight hundred ninety-one".