769198081 has 2 divisors, whose sum is σ = 769198082. Its totient is φ = 769198080.

The previous prime is 769198037. The next prime is 769198091. The reversal of 769198081 is 180891967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 706709056 + 62489025 = 26584^2 + 7905^2 .

It is an emirp because it is prime and its reverse (180891967) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 769198081 - 2¹¹ = 769196033 is a prime.

It is a super-2 number, since 2×769198081² = 1183331375628165122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (769198091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384599040 + 384599041.

It is an arithmetic number, because the mean of its divisors is an integer number (384599041).

Almost surely, 2^769198081 is an apocalyptic number.

It is an amenable number.

769198081 is a deficient number, since it is larger than the sum of its proper divisors (1).

769198081 is an equidigital number, since it uses as much as digits as its factorization.

769198081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 769198081 is about 27734.4205095401. The cubic root of 769198081 is about 916.2473481544.

The spelling of 769198081 in words is "seven hundred sixty-nine million, one hundred ninety-eight thousand, eighty-one".