878109983 has 2 divisors, whose sum is σ = 878109984. Its totient is φ = 878109982.

The previous prime is 878109929. The next prime is 878110019. The reversal of 878109983 is 389901878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878109983 - 2¹⁴ = 878093599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878109913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439054991 + 439054992.

It is an arithmetic number, because the mean of its divisors is an integer number (439054992).

Almost surely, 2^878109983 is an apocalyptic number.

878109983 is a deficient number, since it is larger than the sum of its proper divisors (1).

878109983 is an equidigital number, since it uses as much as digits as its factorization.

878109983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 53.

The square root of 878109983 is about 29632.9205951759. The cubic root of 878109983 is about 957.5974292940.

The spelling of 878109983 in words is "eight hundred seventy-eight million, one hundred nine thousand, nine hundred eighty-three".