878940841 has 2 divisors, whose sum is σ = 878940842. Its totient is φ = 878940840.

The previous prime is 878940823. The next prime is 878940847. The reversal of 878940841 is 148049878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 876396816 + 2544025 = 29604^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 878940841 - 2¹⁷ = 878809769 is a prime.

It is not a weakly prime, because it can be changed into another prime (878940847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439470420 + 439470421.

It is an arithmetic number, because the mean of its divisors is an integer number (439470421).

Almost surely, 2^878940841 is an apocalyptic number.

It is an amenable number.

878940841 is a deficient number, since it is larger than the sum of its proper divisors (1).

878940841 is an equidigital number, since it uses as much as digits as its factorization.

878940841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 878940841 is about 29646.9364521868. The cubic root of 878940841 is about 957.8993568027.

The spelling of 878940841 in words is "eight hundred seventy-eight million, nine hundred forty thousand, eight hundred forty-one".