766789873 has 2 divisors, whose sum is σ = 766789874. Its totient is φ = 766789872.

The previous prime is 766789823. The next prime is 766789921. The reversal of 766789873 is 378987667.

766789873 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., 644753664 + 122036209 = 25392^2 + 11047^2 .

It is an emirp because it is prime and its reverse (378987667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766789873 - 2¹⁷ = 766658801 is a prime.

It is a super-2 number, since 2×766789873² = 1175933418670712258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (766789823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383394936 + 383394937.

It is an arithmetic number, because the mean of its divisors is an integer number (383394937).

Almost surely, 2^766789873 is an apocalyptic number.

It is an amenable number.

766789873 is a deficient number, since it is larger than the sum of its proper divisors (1).

766789873 is an equidigital number, since it uses as much as digits as its factorization.

766789873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21337344, while the sum is 61.

The square root of 766789873 is about 27690.9709652804. The cubic root of 766789873 is about 915.2901517431.

The spelling of 766789873 in words is "seven hundred sixty-six million, seven hundred eighty-nine thousand, eight hundred seventy-three".