878259013 has 2 divisors, whose sum is σ = 878259014. Its totient is φ = 878259012.

The previous prime is 878259001. The next prime is 878259017. The reversal of 878259013 is 310952878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 794225124 + 84033889 = 28182^2 + 9167^2 .

It is a cyclic number.

It is not a de Polignac number, because 878259013 - 2⁹ = 878258501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878259017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439129506 + 439129507.

It is an arithmetic number, because the mean of its divisors is an integer number (439129507).

Almost surely, 2^878259013 is an apocalyptic number.

It is an amenable number.

878259013 is a deficient number, since it is larger than the sum of its proper divisors (1).

878259013 is an equidigital number, since it uses as much as digits as its factorization.

878259013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 878259013 is about 29635.4350904454. The cubic root of 878259013 is about 957.6515996807.

The spelling of 878259013 in words is "eight hundred seventy-eight million, two hundred fifty-nine thousand, thirteen".