878345231 has 2 divisors, whose sum is σ = 878345232. Its totient is φ = 878345230.

The previous prime is 878345197. The next prime is 878345233. The reversal of 878345231 is 132543878.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878345231 is a prime.

It is a super-2 number, since 2×878345231² = 1542980689640886722, which contains 22 as substring.

Together with 878345233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878345233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439172615 + 439172616.

It is an arithmetic number, because the mean of its divisors is an integer number (439172616).

Almost surely, 2^878345231 is an apocalyptic number.

878345231 is a deficient number, since it is larger than the sum of its proper divisors (1).

878345231 is an equidigital number, since it uses as much as digits as its factorization.

878345231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 878345231 is about 29636.8896984822. The cubic root of 878345231 is about 957.6829359580.

The spelling of 878345231 in words is "eight hundred seventy-eight million, three hundred forty-five thousand, two hundred thirty-one".