2178750779 has 2 divisors, whose sum is σ = 2178750780. Its totient is φ = 2178750778.

The previous prime is 2178750737. The next prime is 2178750797. The reversal of 2178750779 is 9770578712.

2178750779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (2178750797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2178750779 - 2²⁰ = 2177702203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2178750779.

It is not a weakly prime, because it can be changed into another prime (2178755779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089375389 + 1089375390.

It is an arithmetic number, because the mean of its divisors is an integer number (1089375390).

Almost surely, 2^2178750779 is an apocalyptic number.

2178750779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2178750779 is an equidigital number, since it uses as much as digits as its factorization.

2178750779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728720, while the sum is 53.

The square root of 2178750779 is about 46677.0905155838. The cubic root of 2178750779 is about 1296.3905356839.

The spelling of 2178750779 in words is "two billion, one hundred seventy-eight million, seven hundred fifty thousand, seven hundred seventy-nine".