674443989 has 10 divisors (see below), whose sum is σ = 1007502870. Its totient is φ = 449629272.

The previous prime is 674443951. The next prime is 674444011. The reversal of 674443989 is 989344476.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 490976964 + 183467025 = 22158^2 + 13545^2 .

It is not a de Polignac number, because 674443989 - 2⁹ = 674443477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674443919) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4163154 + ... + 4163315.

It is an arithmetic number, because the mean of its divisors is an integer number (100750287).

Almost surely, 2^674443989 is an apocalyptic number.

It is an amenable number.

674443989 is a deficient number, since it is larger than the sum of its proper divisors (333058881).

674443989 is an equidigital number, since it uses as much as digits as its factorization.

674443989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8326481 (or 8326472 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 674443989 is about 25970.0594724001. The cubic root of 674443989 is about 876.9643981115.

The spelling of 674443989 in words is "six hundred seventy-four million, four hundred forty-three thousand, nine hundred eighty-nine".