878923117349 has 2 divisors, whose sum is σ = 878923117350. Its totient is φ = 878923117348.

The previous prime is 878923117343. The next prime is 878923117421. The reversal of 878923117349 is 943711329878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 815074924225 + 63848193124 = 902815^2 + 252682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878923117349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 878923117291 and 878923117300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878923117343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439461558674 + 439461558675.

It is an arithmetic number, because the mean of its divisors is an integer number (439461558675).

Almost surely, 2^878923117349 is an apocalyptic number.

It is an amenable number.

878923117349 is a deficient number, since it is larger than the sum of its proper divisors (1).

878923117349 is an equidigital number, since it uses as much as digits as its factorization.

878923117349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 62.

The spelling of 878923117349 in words is "eight hundred seventy-eight billion, nine hundred twenty-three million, one hundred seventeen thousand, three hundred forty-nine".