769821317 has 2 divisors, whose sum is σ = 769821318. Its totient is φ = 769821316.

The previous prime is 769821313. The next prime is 769821331. The reversal of 769821317 is 713128967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 521254561 + 248566756 = 22831^2 + 15766^2 .

It is an emirp because it is prime and its reverse (713128967) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 769821317 - 2² = 769821313 is a prime.

It is a super-2 number, since 2×769821317² = 1185249720215228978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (769821313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384910658 + 384910659.

It is an arithmetic number, because the mean of its divisors is an integer number (384910659).

Almost surely, 2^769821317 is an apocalyptic number.

It is an amenable number.

769821317 is a deficient number, since it is larger than the sum of its proper divisors (1).

769821317 is an equidigital number, since it uses as much as digits as its factorization.

769821317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 769821317 is about 27745.6540200443. The cubic root of 769821317 is about 916.4947418100.

The spelling of 769821317 in words is "seven hundred sixty-nine million, eight hundred twenty-one thousand, three hundred seventeen".