80775769 has 2 divisors, whose sum is σ = 80775770. Its totient is φ = 80775768.

The previous prime is 80775767. The next prime is 80775787. The reversal of 80775769 is 96757708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49000000 + 31775769 = 7000^2 + 5637^2 .

It is a cyclic number.

It is not a de Polignac number, because 80775769 - 2¹ = 80775767 is a prime.

It is a super-2 number, since 2×80775769² = 13049449715082722, which contains 22 as substring.

Together with 80775767, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80775767) 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, 40387884 + 40387885.

It is an arithmetic number, because the mean of its divisors is an integer number (40387885).

Almost surely, 2^80775769 is an apocalyptic number.

It is an amenable number.

80775769 is a deficient number, since it is larger than the sum of its proper divisors (1).

80775769 is an equidigital number, since it uses as much as digits as its factorization.

80775769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740880, while the sum is 49.

The square root of 80775769 is about 8987.5340889479. The cubic root of 80775769 is about 432.2752464731.

The spelling of 80775769 in words is "eighty million, seven hundred seventy-five thousand, seven hundred sixty-nine".