500230981 has 2 divisors, whose sum is σ = 500230982. Its totient is φ = 500230980.

The previous prime is 500230949. The next prime is 500231027. The reversal of 500230981 is 189032005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319193956 + 181037025 = 17866^2 + 13455^2 .

It is a cyclic number.

It is not a de Polignac number, because 500230981 - 2⁵ = 500230949 is a prime.

It is a super-2 number, since 2×500230981² = 500462068704444722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500230901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250115490 + 250115491.

It is an arithmetic number, because the mean of its divisors is an integer number (250115491).

Almost surely, 2^500230981 is an apocalyptic number.

It is an amenable number.

500230981 is a deficient number, since it is larger than the sum of its proper divisors (1).

500230981 is an equidigital number, since it uses as much as digits as its factorization.

500230981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 500230981 is about 22365.8440708148. The cubic root of 500230981 is about 793.8227269961.

Adding to 500230981 its reverse (189032005), we get a palindrome (689262986).

The spelling of 500230981 in words is "five hundred million, two hundred thirty thousand, nine hundred eighty-one".