2178304073 has 6 divisors (see below), whose sum is σ = 2394334362. Its totient is φ = 1980276320.

The previous prime is 2178304043. The next prime is 2178304111. The reversal of 2178304073 is 3704038712.

It can be written as a sum of positive squares in only one way, i.e., 1324086544 + 854217529 = 36388^2 + 29227^2 .

It is not a de Polignac number, because 2178304073 - 2⁸ = 2178303817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2178304043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9001136 + ... + 9001377.

It is an arithmetic number, because the mean of its divisors is an integer number (399055727).

Almost surely, 2^2178304073 is an apocalyptic number.

It is an amenable number.

2178304073 is a deficient number, since it is larger than the sum of its proper divisors (216030289).

2178304073 is a wasteful number, since it uses less digits than its factorization.

2178304073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18002535 (or 18002524 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 2178304073 is about 46672.3052034073. The cubic root of 2178304073 is about 1296.3019306266.

The spelling of 2178304073 in words is "two billion, one hundred seventy-eight million, three hundred four thousand, seventy-three".