769998881 has 2 divisors, whose sum is σ = 769998882. Its totient is φ = 769998880.

The previous prime is 769998877. The next prime is 769998917. The reversal of 769998881 is 188899967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 452838400 + 317160481 = 21280^2 + 17809^2 .

It is an emirp because it is prime and its reverse (188899967) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 769998881 - 2² = 769998877 is a prime.

It is a super-2 number, since 2×769998881² = 1185796553482504322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (769998821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384999440 + 384999441.

It is an arithmetic number, because the mean of its divisors is an integer number (384999441).

Almost surely, 2^769998881 is an apocalyptic number.

It is an amenable number.

769998881 is a deficient number, since it is larger than the sum of its proper divisors (1).

769998881 is an equidigital number, since it uses as much as digits as its factorization.

769998881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 65.

The square root of 769998881 is about 27748.8536880355. The cubic root of 769998881 is about 916.5652014341.

The spelling of 769998881 in words is "seven hundred sixty-nine million, nine hundred ninety-eight thousand, eight hundred eighty-one".