2078823721 has 8 divisors (see below), whose sum is σ = 2239944840. Its totient is φ = 1917875712.

The previous prime is 2078823689. The next prime is 2078823739. The reversal of 2078823721 is 1273288702.

It can be written as a sum of positive squares in 4 ways, for example, as 18662400 + 2060161321 = 4320^2 + 45389^2 .

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 2078823721 - 2⁵ = 2078823689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2078829721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17770 + ... + 66883.

It is an arithmetic number, because the mean of its divisors is an integer number (279993105).

Almost surely, 2^2078823721 is an apocalyptic number.

It is an amenable number.

2078823721 is a deficient number, since it is larger than the sum of its proper divisors (161121119).

2078823721 is a wasteful number, since it uses less digits than its factorization.

2078823721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86555.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 2078823721 is about 45594.1193686203. The cubic root of 2078823721 is about 1276.2601860076.

The spelling of 2078823721 in words is "two billion, seventy-eight million, eight hundred twenty-three thousand, seven hundred twenty-one".