768737881 has 2 divisors, whose sum is σ = 768737882. Its totient is φ = 768737880.

The previous prime is 768737867. The next prime is 768737899. The reversal of 768737881 is 188737867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 734410000 + 34327881 = 27100^2 + 5859^2 .

It is an emirp because it is prime and its reverse (188737867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 768737881 - 2¹¹ = 768735833 is a prime.

It is a super-2 number, since 2×768737881² = 1181915859368740322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (768737581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384368940 + 384368941.

It is an arithmetic number, because the mean of its divisors is an integer number (384368941).

Almost surely, 2^768737881 is an apocalyptic number.

It is an amenable number.

768737881 is a deficient number, since it is larger than the sum of its proper divisors (1).

768737881 is an equidigital number, since it uses as much as digits as its factorization.

768737881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 55.

The square root of 768737881 is about 27726.1227184762. The cubic root of 768737881 is about 916.0645858905.

The spelling of 768737881 in words is "seven hundred sixty-eight million, seven hundred thirty-seven thousand, eight hundred eighty-one".