878134919 has 2 divisors, whose sum is σ = 878134920. Its totient is φ = 878134918.

The previous prime is 878134903. The next prime is 878134921. The reversal of 878134919 is 919431878.

878134919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878134919 - 2⁴ = 878134903 is a prime.

It is a super-2 number, since 2×878134919² = 1542241871934273122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 878134921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878134969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439067459 + 439067460.

It is an arithmetic number, because the mean of its divisors is an integer number (439067460).

Almost surely, 2^878134919 is an apocalyptic number.

878134919 is a deficient number, since it is larger than the sum of its proper divisors (1).

878134919 is an equidigital number, since it uses as much as digits as its factorization.

878134919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 50.

The square root of 878134919 is about 29633.3413404564. The cubic root of 878134919 is about 957.6064936192.

The spelling of 878134919 in words is "eight hundred seventy-eight million, one hundred thirty-four thousand, nine hundred nineteen".