674281919 has 2 divisors, whose sum is σ = 674281920. Its totient is φ = 674281918.

The previous prime is 674281879. The next prime is 674281921. The reversal of 674281919 is 919182476.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 674281919 - 2¹² = 674277823 is a prime.

It is a super-2 number, since 2×674281919² = 909312212580645122, which contains 22 as substring.

Together with 674281921, 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 (674281019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337140959 + 337140960.

It is an arithmetic number, because the mean of its divisors is an integer number (337140960).

Almost surely, 2^674281919 is an apocalyptic number.

674281919 is a deficient number, since it is larger than the sum of its proper divisors (1).

674281919 is an equidigital number, since it uses as much as digits as its factorization.

674281919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 674281919 is about 25966.9389609172. The cubic root of 674281919 is about 876.8941471549.

The spelling of 674281919 in words is "six hundred seventy-four million, two hundred eighty-one thousand, nine hundred nineteen".