878351641 has 2 divisors, whose sum is σ = 878351642. Its totient is φ = 878351640.

The previous prime is 878351633. The next prime is 878351647. The reversal of 878351641 is 146153878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783776016 + 94575625 = 27996^2 + 9725^2 .

It is a cyclic number.

It is not a de Polignac number, because 878351641 - 2³ = 878351633 is a prime.

It is not a weakly prime, because it can be changed into another prime (878351647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439175820 + 439175821.

It is an arithmetic number, because the mean of its divisors is an integer number (439175821).

Almost surely, 2^878351641 is an apocalyptic number.

It is an amenable number.

878351641 is a deficient number, since it is larger than the sum of its proper divisors (1).

878351641 is an equidigital number, since it uses as much as digits as its factorization.

878351641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 878351641 is about 29636.9978405371. The cubic root of 878351641 is about 957.6852656163.

The spelling of 878351641 in words is "eight hundred seventy-eight million, three hundred fifty-one thousand, six hundred forty-one".