674709491 has 2 divisors, whose sum is σ = 674709492. Its totient is φ = 674709490.

The previous prime is 674709473. The next prime is 674709493. The reversal of 674709491 is 194907476.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 674709491 - 2¹⁰ = 674708467 is a prime.

Together with 674709493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (674709493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337354745 + 337354746.

It is an arithmetic number, because the mean of its divisors is an integer number (337354746).

Almost surely, 2^674709491 is an apocalyptic number.

674709491 is a deficient number, since it is larger than the sum of its proper divisors (1).

674709491 is an equidigital number, since it uses as much as digits as its factorization.

674709491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 674709491 is about 25975.1706635394. The cubic root of 674709491 is about 877.0794584473.

The spelling of 674709491 in words is "six hundred seventy-four million, seven hundred nine thousand, four hundred ninety-one".