500117021 has 2 divisors, whose sum is σ = 500117022. Its totient is φ = 500117020.

The previous prime is 500116973. The next prime is 500117027. The reversal of 500117021 is 120711005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346480996 + 153636025 = 18614^2 + 12395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-500117021 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 (500117027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250058510 + 250058511.

It is an arithmetic number, because the mean of its divisors is an integer number (250058511).

Almost surely, 2^500117021 is an apocalyptic number.

It is an amenable number.

500117021 is a deficient number, since it is larger than the sum of its proper divisors (1).

500117021 is an equidigital number, since it uses as much as digits as its factorization.

500117021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 500117021 is about 22363.2962910211. The cubic root of 500117021 is about 793.7624409070.

Adding to 500117021 its reverse (120711005), we get a palindrome (620828026).

It can be divided in two parts, 5001 and 17021, that added together give a palindrome (22022).

The spelling of 500117021 in words is "five hundred million, one hundred seventeen thousand, twenty-one".