80105969 has 2 divisors, whose sum is σ = 80105970. Its totient is φ = 80105968.

The previous prime is 80105951. The next prime is 80105983. The reversal of 80105969 is 96950108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50239744 + 29866225 = 7088^2 + 5465^2 .

It is a cyclic number.

It is not a de Polignac number, because 80105969 - 2¹² = 80101873 is a prime.

It is a super-2 number, since 2×80105969² = 12833932538857922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (80105269) 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, 40052984 + 40052985.

It is an arithmetic number, because the mean of its divisors is an integer number (40052985).

Almost surely, 2^80105969 is an apocalyptic number.

It is an amenable number.

80105969 is a deficient number, since it is larger than the sum of its proper divisors (1).

80105969 is an equidigital number, since it uses as much as digits as its factorization.

80105969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 80105969 is about 8950.1937967845. The cubic root of 80105969 is about 431.0771068058.

The spelling of 80105969 in words is "eighty million, one hundred five thousand, nine hundred sixty-nine".