878223908423 has 2 divisors, whose sum is σ = 878223908424. Its totient is φ = 878223908422.

The previous prime is 878223908417. The next prime is 878223908447. The reversal of 878223908423 is 324809322878.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 878223908423 - 2¹⁶ = 878223842887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878223908413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439111954211 + 439111954212.

It is an arithmetic number, because the mean of its divisors is an integer number (439111954212).

Almost surely, 2^878223908423 is an apocalyptic number.

878223908423 is a deficient number, since it is larger than the sum of its proper divisors (1).

878223908423 is an equidigital number, since it uses as much as digits as its factorization.

878223908423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9289728, while the sum is 56.

The spelling of 878223908423 in words is "eight hundred seventy-eight billion, two hundred twenty-three million, nine hundred eight thousand, four hundred twenty-three".