500308381 has 2 divisors, whose sum is σ = 500308382. Its totient is φ = 500308380.

The previous prime is 500308379. The next prime is 500308409. The reversal of 500308381 is 183803005.

It is an a-pointer prime, because the next prime (500308409) can be obtained adding 500308381 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499120281 + 1188100 = 22341^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 500308381 - 2¹ = 500308379 is a prime.

It is a super-2 number, since 2×500308381² = 500616952197682322, which contains 22 as substring.

Together with 500308379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500308321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250154190 + 250154191.

It is an arithmetic number, because the mean of its divisors is an integer number (250154191).

Almost surely, 2^500308381 is an apocalyptic number.

It is an amenable number.

500308381 is a deficient number, since it is larger than the sum of its proper divisors (1).

500308381 is an equidigital number, since it uses as much as digits as its factorization.

500308381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 500308381 is about 22367.5743208780. The cubic root of 500308381 is about 793.8636672235.

The spelling of 500308381 in words is "five hundred million, three hundred eight thousand, three hundred eighty-one".