674888581 has 2 divisors, whose sum is σ = 674888582. Its totient is φ = 674888580.

The previous prime is 674888573. The next prime is 674888587. The reversal of 674888581 is 185888476.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416772225 + 258116356 = 20415^2 + 16066^2 .

It is a cyclic number.

It is not a de Polignac number, because 674888581 - 2³ = 674888573 is a prime.

It is a super-2 number, since 2×674888581² = 910949193528387122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674888587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337444290 + 337444291.

It is an arithmetic number, because the mean of its divisors is an integer number (337444291).

Almost surely, 2^674888581 is an apocalyptic number.

It is an amenable number.

674888581 is a deficient number, since it is larger than the sum of its proper divisors (1).

674888581 is an equidigital number, since it uses as much as digits as its factorization.

674888581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3440640, while the sum is 55.

The square root of 674888581 is about 25978.6177653854. The cubic root of 674888581 is about 877.1570534550.

The spelling of 674888581 in words is "six hundred seventy-four million, eight hundred eighty-eight thousand, five hundred eighty-one".