674265989 has 2 divisors, whose sum is σ = 674265990. Its totient is φ = 674265988.

The previous prime is 674265937. The next prime is 674266003. The reversal of 674265989 is 989562476.

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., 550277764 + 123988225 = 23458^2 + 11135^2 .

It is a cyclic number.

It is not a de Polignac number, because 674265989 - 2¹² = 674261893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674265289) 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, 337132994 + 337132995.

It is an arithmetic number, because the mean of its divisors is an integer number (337132995).

Almost surely, 2^674265989 is an apocalyptic number.

It is an amenable number.

674265989 is a deficient number, since it is larger than the sum of its proper divisors (1).

674265989 is an equidigital number, since it uses as much as digits as its factorization.

674265989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 56.

The square root of 674265989 is about 25966.6322229125. The cubic root of 674265989 is about 876.8872415202.

The spelling of 674265989 in words is "six hundred seventy-four million, two hundred sixty-five thousand, nine hundred eighty-nine".