878596981 has 2 divisors, whose sum is σ = 878596982. Its totient is φ = 878596980.

The previous prime is 878596949. The next prime is 878597003. The reversal of 878596981 is 189695878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 878588881 + 8100 = 29641^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 878596981 - 2⁵ = 878596949 is a prime.

It is a super-2 number, since 2×878596981² = 1543865310044628722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878596781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439298490 + 439298491.

It is an arithmetic number, because the mean of its divisors is an integer number (439298491).

Almost surely, 2^878596981 is an apocalyptic number.

It is an amenable number.

878596981 is a deficient number, since it is larger than the sum of its proper divisors (1).

878596981 is an equidigital number, since it uses as much as digits as its factorization.

878596981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 61.

The square root of 878596981 is about 29641.1366347514. The cubic root of 878596981 is about 957.7744237694.

The spelling of 878596981 in words is "eight hundred seventy-eight million, five hundred ninety-six thousand, nine hundred eighty-one".