674171887 has 2 divisors, whose sum is σ = 674171888. Its totient is φ = 674171886.

The previous prime is 674171881. The next prime is 674171891. The reversal of 674171887 is 788171476.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 674171887 - 2³ = 674171879 is a prime.

It is a super-2 number, since 2×674171887² = 909015466442281538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 674171887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674171881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337085943 + 337085944.

It is an arithmetic number, because the mean of its divisors is an integer number (337085944).

Almost surely, 2^674171887 is an apocalyptic number.

674171887 is a deficient number, since it is larger than the sum of its proper divisors (1).

674171887 is an equidigital number, since it uses as much as digits as its factorization.

674171887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 526848, while the sum is 49.

The square root of 674171887 is about 25964.8201803902. The cubic root of 674171887 is about 876.8464462042.

The spelling of 674171887 in words is "six hundred seventy-four million, one hundred seventy-one thousand, eight hundred eighty-seven".