2178811423 has 2 divisors, whose sum is σ = 2178811424. Its totient is φ = 2178811422.

The previous prime is 2178811387. The next prime is 2178811447. The reversal of 2178811423 is 3241188712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2178811423 - 2⁹ = 2178810911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2178812423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089405711 + 1089405712.

It is an arithmetic number, because the mean of its divisors is an integer number (1089405712).

Almost surely, 2^2178811423 is an apocalyptic number.

2178811423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2178811423 is an equidigital number, since it uses as much as digits as its factorization.

2178811423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 37.

The square root of 2178811423 is about 46677.7401231036. The cubic root of 2178811423 is about 1296.4025636128.

The spelling of 2178811423 in words is "two billion, one hundred seventy-eight million, eight hundred eleven thousand, four hundred twenty-three".