879428257 has 2 divisors, whose sum is σ = 879428258. Its totient is φ = 879428256.

The previous prime is 879428227. The next prime is 879428261. The reversal of 879428257 is 752824978.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 877581376 + 1846881 = 29624^2 + 1359^2 .

It is a cyclic number.

It is not a de Polignac number, because 879428257 - 2¹¹ = 879426209 is a prime.

It is not a weakly prime, because it can be changed into another prime (879428227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439714128 + 439714129.

It is an arithmetic number, because the mean of its divisors is an integer number (439714129).

Almost surely, 2^879428257 is an apocalyptic number.

It is an amenable number.

879428257 is a deficient number, since it is larger than the sum of its proper divisors (1).

879428257 is an equidigital number, since it uses as much as digits as its factorization.

879428257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 52.

The square root of 879428257 is about 29655.1556563104. The cubic root of 879428257 is about 958.0763915443.

The spelling of 879428257 in words is "eight hundred seventy-nine million, four hundred twenty-eight thousand, two hundred fifty-seven".