494939381 has 2 divisors, whose sum is σ = 494939382. Its totient is φ = 494939380.

The previous prime is 494939371. The next prime is 494939383. The reversal of 494939381 is 183939494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339812356 + 155127025 = 18434^2 + 12455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-494939381 is a prime.

It is a super-2 number, since 2×494939381² = 489929981729326322, which contains 22 as substring.

Together with 494939383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494939383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247469690 + 247469691.

It is an arithmetic number, because the mean of its divisors is an integer number (247469691).

Almost surely, 2^494939381 is an apocalyptic number.

It is an amenable number.

494939381 is a deficient number, since it is larger than the sum of its proper divisors (1).

494939381 is an equidigital number, since it uses as much as digits as its factorization.

494939381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 50.

The square root of 494939381 is about 22247.2331088610. The cubic root of 494939381 is about 791.0136968385.

The spelling of 494939381 in words is "four hundred ninety-four million, nine hundred thirty-nine thousand, three hundred eighty-one".