180078817 has 2 divisors, whose sum is σ = 180078818. Its totient is φ = 180078816.

The previous prime is 180078793. The next prime is 180078869. The reversal of 180078817 is 718870081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146797456 + 33281361 = 12116^2 + 5769^2 .

It is an emirp because it is prime and its reverse (718870081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180078817 - 2²³ = 171690209 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 180078817.

It is not a weakly prime, because it can be changed into another prime (180078317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90039408 + 90039409.

It is an arithmetic number, because the mean of its divisors is an integer number (90039409).

Almost surely, 2^180078817 is an apocalyptic number.

It is an amenable number.

180078817 is a deficient number, since it is larger than the sum of its proper divisors (1).

180078817 is an equidigital number, since it uses as much as digits as its factorization.

180078817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 40.

The square root of 180078817 is about 13419.3448796877. The cubic root of 180078817 is about 564.7040160105.

The spelling of 180078817 in words is "one hundred eighty million, seventy-eight thousand, eight hundred seventeen".