878683439 has 2 divisors, whose sum is σ = 878683440. Its totient is φ = 878683438.

The previous prime is 878683411. The next prime is 878683459. The reversal of 878683439 is 934386878.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878683439 - 2¹² = 878679343 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878683459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439341719 + 439341720.

It is an arithmetic number, because the mean of its divisors is an integer number (439341720).

Almost surely, 2^878683439 is an apocalyptic number.

878683439 is a deficient number, since it is larger than the sum of its proper divisors (1).

878683439 is an equidigital number, since it uses as much as digits as its factorization.

878683439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 56.

The square root of 878683439 is about 29642.5950112334. The cubic root of 878683439 is about 957.8058392143.

The spelling of 878683439 in words is "eight hundred seventy-eight million, six hundred eighty-three thousand, four hundred thirty-nine".