878244499609 has 3 divisors (see below), whose sum is σ = 878245436757. Its totient is φ = 878243562462.

The previous prime is 878244499597. The next prime is 878244499621. The reversal of 878244499609 is 906994442878.

The square root of 878244499609 is 937147.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (878244499597) and next prime (878244499621).

It is not a de Polignac number, because 878244499609 - 2⁵ = 878244499577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878244499009) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 468574 + ... + 1405720.

It is an arithmetic number, because the mean of its divisors is an integer number (292748478919).

Almost surely, 2^878244499609 is an apocalyptic number.

878244499609 is the 937147-th square number.

878244499609 is the 468574-th centered octagonal number.

It is an amenable number.

878244499609 is a deficient number, since it is larger than the sum of its proper divisors (937148).

878244499609 is an frugal number, since it uses more digits than its factorization.

878244499609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874294 (or 937147 counting only the distinct ones).

The product of its (nonzero) digits is 250822656, while the sum is 70.

The spelling of 878244499609 in words is "eight hundred seventy-eight billion, two hundred forty-four million, four hundred ninety-nine thousand, six hundred nine".