80117969 has 2 divisors, whose sum is σ = 80117970. Its totient is φ = 80117968.

The previous prime is 80117963. The next prime is 80118001. The reversal of 80117969 is 96971108.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58140625 + 21977344 = 7625^2 + 4688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80117969 is a prime.

It is a super-2 number, since 2×80117969² = 12837777913369922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_4675865 and since 80117969 and 4675865 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (80117963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40058984 + 40058985.

It is an arithmetic number, because the mean of its divisors is an integer number (40058985).

Almost surely, 2^80117969 is an apocalyptic number.

It is an amenable number.

80117969 is a deficient number, since it is larger than the sum of its proper divisors (1).

80117969 is an equidigital number, since it uses as much as digits as its factorization.

80117969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 80117969 is about 8950.8641482261. The cubic root of 80117969 is about 431.0986310737.

The spelling of 80117969 in words is "eighty million, one hundred seventeen thousand, nine hundred sixty-nine".