80185717 has 2 divisors, whose sum is σ = 80185718. Its totient is φ = 80185716.

The previous prime is 80185639. The next prime is 80185723. The reversal of 80185717 is 71758108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60746436 + 19439281 = 7794^2 + 4409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80185717 is a prime.

It is equal to p_4679551 and since 80185717 and 4679551 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80185727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40092858 + 40092859.

It is an arithmetic number, because the mean of its divisors is an integer number (40092859).

Almost surely, 2^80185717 is an apocalyptic number.

It is an amenable number.

80185717 is a deficient number, since it is larger than the sum of its proper divisors (1).

80185717 is an equidigital number, since it uses as much as digits as its factorization.

80185717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 37.

The square root of 80185717 is about 8954.6477876017. The cubic root of 80185717 is about 431.2201096135.

The spelling of 80185717 in words is "eighty million, one hundred eighty-five thousand, seven hundred seventeen".