774545489 has 2 divisors, whose sum is σ = 774545490. Its totient is φ = 774545488.

The previous prime is 774545413. The next prime is 774545533. The reversal of 774545489 is 984545477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 751582225 + 22963264 = 27415^2 + 4792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-774545489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 774545489.

It is not a weakly prime, because it can be changed into another prime (774541489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387272744 + 387272745.

It is an arithmetic number, because the mean of its divisors is an integer number (387272745).

Almost surely, 2^774545489 is an apocalyptic number.

It is an amenable number.

774545489 is a deficient number, since it is larger than the sum of its proper divisors (1).

774545489 is an equidigital number, since it uses as much as digits as its factorization.

774545489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5644800, while the sum is 53.

The square root of 774545489 is about 27830.6573583881. The cubic root of 774545489 is about 918.3656747609.

The spelling of 774545489 in words is "seven hundred seventy-four million, five hundred forty-five thousand, four hundred eighty-nine".