80518117 has 2 divisors, whose sum is σ = 80518118. Its totient is φ = 80518116.

The previous prime is 80518111. The next prime is 80518153. The reversal of 80518117 is 71181508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74753316 + 5764801 = 8646^2 + 2401^2 .

It is a cyclic number.

It is not a de Polignac number, because 80518117 - 2⁷ = 80517989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80518111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40259058 + 40259059.

It is an arithmetic number, because the mean of its divisors is an integer number (40259059).

Almost surely, 2^80518117 is an apocalyptic number.

It is an amenable number.

80518117 is a deficient number, since it is larger than the sum of its proper divisors (1).

80518117 is an equidigital number, since it uses as much as digits as its factorization.

80518117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 31.

The square root of 80518117 is about 8973.1887866020. The cubic root of 80518117 is about 431.8151447475.

The spelling of 80518117 in words is "eighty million, five hundred eighteen thousand, one hundred seventeen".