180078869 has 2 divisors, whose sum is σ = 180078870. Its totient is φ = 180078868.

The previous prime is 180078817. The next prime is 180078911. The reversal of 180078869 is 968870081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179292100 + 786769 = 13390^2 + 887^2 .

It is an emirp because it is prime and its reverse (968870081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180078869 - 2¹² = 180074773 is a prime.

It is a super-2 number, since 2×180078869² = 64856798120638322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180071869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90039434 + 90039435.

It is an arithmetic number, because the mean of its divisors is an integer number (90039435).

Almost surely, 2^180078869 is an apocalyptic number.

It is an amenable number.

180078869 is a deficient number, since it is larger than the sum of its proper divisors (1).

180078869 is an equidigital number, since it uses as much as digits as its factorization.

180078869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 180078869 is about 13419.3468171890. The cubic root of 180078869 is about 564.7040703656.

The spelling of 180078869 in words is "one hundred eighty million, seventy-eight thousand, eight hundred sixty-nine".