674311381 has 2 divisors, whose sum is σ = 674311382. Its totient is φ = 674311380.

The previous prime is 674311367. The next prime is 674311427. The reversal of 674311381 is 183113476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 565964100 + 108347281 = 23790^2 + 10409^2 .

It is a cyclic number.

It is not a de Polignac number, because 674311381 - 2⁹ = 674310869 is a prime.

It is a super-2 number, since 2×674311381² = 909391677092254322, which contains 22 as substring.

It is equal to p_34990450 and since 674311381 and 34990450 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674311321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337155690 + 337155691.

It is an arithmetic number, because the mean of its divisors is an integer number (337155691).

Almost surely, 2^674311381 is an apocalyptic number.

It is an amenable number.

674311381 is a deficient number, since it is larger than the sum of its proper divisors (1).

674311381 is an equidigital number, since it uses as much as digits as its factorization.

674311381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 674311381 is about 25967.5062530078. The cubic root of 674311381 is about 876.9069186077.

The spelling of 674311381 in words is "six hundred seventy-four million, three hundred eleven thousand, three hundred eighty-one".