878345887 has 2 divisors, whose sum is σ = 878345888. Its totient is φ = 878345886.

The previous prime is 878345879. The next prime is 878345891. The reversal of 878345887 is 788543878.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878345887 - 2³ = 878345879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878345807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439172943 + 439172944.

It is an arithmetic number, because the mean of its divisors is an integer number (439172944).

Almost surely, 2^878345887 is an apocalyptic number.

878345887 is a deficient number, since it is larger than the sum of its proper divisors (1).

878345887 is an equidigital number, since it uses as much as digits as its factorization.

878345887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12042240, while the sum is 58.

The square root of 878345887 is about 29636.9007657683. The cubic root of 878345887 is about 957.6831743760.

The spelling of 878345887 in words is "eight hundred seventy-eight million, three hundred forty-five thousand, eight hundred eighty-seven".