878256887 has 2 divisors, whose sum is σ = 878256888. Its totient is φ = 878256886.

The previous prime is 878256787. The next prime is 878256923. The reversal of 878256887 is 788652878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878256887 - 2¹⁰ = 878255863 is a prime.

It is a super-3 number, since 3×878256887³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878256787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439128443 + 439128444.

It is an arithmetic number, because the mean of its divisors is an integer number (439128444).

Almost surely, 2^878256887 is an apocalyptic number.

878256887 is a deficient number, since it is larger than the sum of its proper divisors (1).

878256887 is an equidigital number, since it uses as much as digits as its factorization.

878256887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12042240, while the sum is 59.

The square root of 878256887 is about 29635.3992212017. The cubic root of 878256887 is about 957.6508269516.

The spelling of 878256887 in words is "eight hundred seventy-eight million, two hundred fifty-six thousand, eight hundred eighty-seven".