878786969 has 2 divisors, whose sum is σ = 878786970. Its totient is φ = 878786968.

The previous prime is 878786959. The next prime is 878786981. The reversal of 878786969 is 969687878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 866536969 + 12250000 = 29437^2 + 3500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878786969 is a prime.

It is a super-2 number, since 2×878786969² = 1544533073768413922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 878786899 and 878786908.

It is not a weakly prime, because it can be changed into another prime (878786939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439393484 + 439393485.

It is an arithmetic number, because the mean of its divisors is an integer number (439393485).

Almost surely, 2^878786969 is an apocalyptic number.

It is an amenable number.

878786969 is a deficient number, since it is larger than the sum of its proper divisors (1).

878786969 is an equidigital number, since it uses as much as digits as its factorization.

878786969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73156608, while the sum is 68.

The square root of 878786969 is about 29644.3412643965. The cubic root of 878786969 is about 957.8434552430.

Subtracting 878786969 from its reverse (969687878), we obtain a palindrome (90900909).

The spelling of 878786969 in words is "eight hundred seventy-eight million, seven hundred eighty-six thousand, nine hundred sixty-nine".