785617489 has 2 divisors, whose sum is σ = 785617490. Its totient is φ = 785617488.

The previous prime is 785617451. The next prime is 785617499. The reversal of 785617489 is 984716587.

785617489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 780364225 + 5253264 = 27935^2 + 2292^2 .

It is a cyclic number.

It is not a de Polignac number, because 785617489 - 2⁹ = 785616977 is a prime.

It is not a weakly prime, because it can be changed into another prime (785617429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392808744 + 392808745.

It is an arithmetic number, because the mean of its divisors is an integer number (392808745).

Almost surely, 2^785617489 is an apocalyptic number.

It is an amenable number.

785617489 is a deficient number, since it is larger than the sum of its proper divisors (1).

785617489 is an equidigital number, since it uses as much as digits as its factorization.

785617489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 55.

The square root of 785617489 is about 28028.8688498127. The cubic root of 785617489 is about 922.7209495165.

The spelling of 785617489 in words is "seven hundred eighty-five million, six hundred seventeen thousand, four hundred eighty-nine".