80427517 has 2 divisors, whose sum is σ = 80427518. Its totient is φ = 80427516.

The previous prime is 80427511. The next prime is 80427533. The reversal of 80427517 is 71572408.

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., 78960996 + 1466521 = 8886^2 + 1211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80427517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80427511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40213758 + 40213759.

It is an arithmetic number, because the mean of its divisors is an integer number (40213759).

Almost surely, 2^80427517 is an apocalyptic number.

It is an amenable number.

80427517 is a deficient number, since it is larger than the sum of its proper divisors (1).

80427517 is an equidigital number, since it uses as much as digits as its factorization.

80427517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 80427517 is about 8968.1389931245. The cubic root of 80427517 is about 431.6531226816.

The spelling of 80427517 in words is "eighty million, four hundred twenty-seven thousand, five hundred seventeen".