878131243 has 24 divisors (see below), whose sum is σ = 1027912464. Its totient is φ = 747528320.

The previous prime is 878131217. The next prime is 878131253. The reversal of 878131243 is 342131878.

878131243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 878131243 - 2²⁹ = 341260331 is a prime.

It is a super-2 number, since 2×878131243² = 1542228959865450098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878131253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4457421 + ... + 4457617.

It is an arithmetic number, because the mean of its divisors is an integer number (42829686).

Almost surely, 2^878131243 is an apocalyptic number.

878131243 is a deficient number, since it is larger than the sum of its proper divisors (149781221).

878131243 is an equidigital number, since it uses as much as digits as its factorization.

878131243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 225 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 878131243 is about 29633.2793156613. The cubic root of 878131243 is about 957.6051573909.

The spelling of 878131243 in words is "eight hundred seventy-eight million, one hundred thirty-one thousand, two hundred forty-three".