878824342997 has 4 divisors (see below), whose sum is σ = 884722493100. Its totient is φ = 872926192896.

The previous prime is 878824342927. The next prime is 878824342999. The reversal of 878824342997 is 799243428878.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 381678075601 + 497146267396 = 617801^2 + 705086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878824342997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 878824342997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878824342999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2949074828 + ... + 2949075125.

It is an arithmetic number, because the mean of its divisors is an integer number (221180623275).

Almost surely, 2^878824342997 is an apocalyptic number.

It is an amenable number.

878824342997 is a deficient number, since it is larger than the sum of its proper divisors (5898150103).

878824342997 is a wasteful number, since it uses less digits than its factorization.

878824342997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898150102.

The product of its digits is 390168576, while the sum is 71.

The spelling of 878824342997 in words is "eight hundred seventy-eight billion, eight hundred twenty-four million, three hundred forty-two thousand, nine hundred ninety-seven".