878742671 has 2 divisors, whose sum is σ = 878742672. Its totient is φ = 878742670.

The previous prime is 878742661. The next prime is 878742679. The reversal of 878742671 is 176247878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878742671 - 2⁶ = 878742607 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878742679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439371335 + 439371336.

It is an arithmetic number, because the mean of its divisors is an integer number (439371336).

Almost surely, 2^878742671 is an apocalyptic number.

878742671 is a deficient number, since it is larger than the sum of its proper divisors (1).

878742671 is an equidigital number, since it uses as much as digits as its factorization.

878742671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1053696, while the sum is 50.

The square root of 878742671 is about 29643.5940972076. The cubic root of 878742671 is about 957.8273606096.

The spelling of 878742671 in words is "eight hundred seventy-eight million, seven hundred forty-two thousand, six hundred seventy-one".