878122369 has 8 divisors (see below), whose sum is σ = 954906408. Its totient is φ = 804130560.

The previous prime is 878122351. The next prime is 878122387. The reversal of 878122369 is 963221878.

It is an interprime number because it is at equal distance from previous prime (878122351) and next prime (878122387).

It can be written as a sum of positive squares in 4 ways, for example, as 148474225 + 729648144 = 12185^2 + 27012^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 878122369 - 2⁷ = 878122241 is a prime.

It is a super-2 number, since 2×878122369² = 1542197789876344322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878122319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697402 + ... + 698659.

It is an arithmetic number, because the mean of its divisors is an integer number (119363301).

Almost surely, 2^878122369 is an apocalyptic number.

It is an amenable number.

878122369 is a deficient number, since it is larger than the sum of its proper divisors (76784039).

878122369 is a wasteful number, since it uses less digits than its factorization.

878122369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396115.

The product of its digits is 290304, while the sum is 46.

The square root of 878122369 is about 29633.1295849763. The cubic root of 878122369 is about 957.6019316708.

The spelling of 878122369 in words is "eight hundred seventy-eight million, one hundred twenty-two thousand, three hundred sixty-nine".