771713609 has 2 divisors, whose sum is σ = 771713610. Its totient is φ = 771713608.

The previous prime is 771713573. The next prime is 771713627. The reversal of 771713609 is 906317177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 770340025 + 1373584 = 27755^2 + 1172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-771713609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (771713209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385856804 + 385856805.

It is an arithmetic number, because the mean of its divisors is an integer number (385856805).

Almost surely, 2^771713609 is an apocalyptic number.

It is an amenable number.

771713609 is a deficient number, since it is larger than the sum of its proper divisors (1).

771713609 is an equidigital number, since it uses as much as digits as its factorization.

771713609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55566, while the sum is 41.

The square root of 771713609 is about 27779.7337820217. The cubic root of 771713609 is about 917.2450703013.

The spelling of 771713609 in words is "seven hundred seventy-one million, seven hundred thirteen thousand, six hundred nine".