674636489 has 2 divisors, whose sum is σ = 674636490. Its totient is φ = 674636488.

The previous prime is 674636461. The next prime is 674636561. The reversal of 674636489 is 984636476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497959225 + 176677264 = 22315^2 + 13292^2 .

It is a cyclic number.

It is not a de Polignac number, because 674636489 - 2¹² = 674632393 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 674636489.

It is not a weakly prime, because it can be changed into another prime (674636089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337318244 + 337318245.

It is an arithmetic number, because the mean of its divisors is an integer number (337318245).

Almost surely, 2^674636489 is an apocalyptic number.

It is an amenable number.

674636489 is a deficient number, since it is larger than the sum of its proper divisors (1).

674636489 is an equidigital number, since it uses as much as digits as its factorization.

674636489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 53.

The square root of 674636489 is about 25973.7653989559. The cubic root of 674636489 is about 877.0478246529.

The spelling of 674636489 in words is "six hundred seventy-four million, six hundred thirty-six thousand, four hundred eighty-nine".