878847131 has 2 divisors, whose sum is σ = 878847132. Its totient is φ = 878847130.

The previous prime is 878847127. The next prime is 878847139. The reversal of 878847131 is 131748878.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 878847131 - 2² = 878847127 is a prime.

It is a super-2 number, since 2×878847131² = 1544744559333862322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (878847139) 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, 439423565 + 439423566.

It is an arithmetic number, because the mean of its divisors is an integer number (439423566).

Almost surely, 2^878847131 is an apocalyptic number.

878847131 is a deficient number, since it is larger than the sum of its proper divisors (1).

878847131 is an equidigital number, since it uses as much as digits as its factorization.

878847131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 301056, while the sum is 47.

The square root of 878847131 is about 29645.3559769486. The cubic root of 878847131 is about 957.8653128205.

The spelling of 878847131 in words is "eight hundred seventy-eight million, eight hundred forty-seven thousand, one hundred thirty-one".