878531531 has 2 divisors, whose sum is σ = 878531532. Its totient is φ = 878531530.

The previous prime is 878531527. The next prime is 878531579. The reversal of 878531531 is 135135878.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 878531531 - 2² = 878531527 is a prime.

It is a super-2 number, since 2×878531531² = 1543635301922407922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (878531501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439265765 + 439265766.

It is an arithmetic number, because the mean of its divisors is an integer number (439265766).

Almost surely, 2^878531531 is an apocalyptic number.

878531531 is a deficient number, since it is larger than the sum of its proper divisors (1).

878531531 is an equidigital number, since it uses as much as digits as its factorization.

878531531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The square root of 878531531 is about 29640.0325742061. The cubic root of 878531531 is about 957.7506404368.

The spelling of 878531531 in words is "eight hundred seventy-eight million, five hundred thirty-one thousand, five hundred thirty-one".