80420269 has 2 divisors, whose sum is σ = 80420270. Its totient is φ = 80420268.

The previous prime is 80420117. The next prime is 80420273. The reversal of 80420269 is 96202408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53846244 + 26574025 = 7338^2 + 5155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80420269 is a prime.

It is a super-2 number, since 2×80420269² = 12934839332064722, which contains 22 as substring.

It is a Chen prime.

It is equal to p_4692523 and since 80420269 and 4692523 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80420269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80420279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40210134 + 40210135.

It is an arithmetic number, because the mean of its divisors is an integer number (40210135).

Almost surely, 2^80420269 is an apocalyptic number.

It is an amenable number.

80420269 is a deficient number, since it is larger than the sum of its proper divisors (1).

80420269 is an equidigital number, since it uses as much as digits as its factorization.

80420269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 80420269 is about 8967.7348868039. The cubic root of 80420269 is about 431.6401556610.

The spelling of 80420269 in words is "eighty million, four hundred twenty thousand, two hundred sixty-nine".