7873689281 has 16 divisors (see below), whose sum is σ = 9012821760. Its totient is φ = 6830749440.

The previous prime is 7873689277. The next prime is 7873689301. The reversal of 7873689281 is 1829863787.

It is a cyclic number.

It is not a de Polignac number, because 7873689281 - 2² = 7873689277 is a prime.

It is a super-2 number, since 2×7873689281² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 7873689281.

It is not an unprimeable number, because it can be changed into a prime (7873689221) 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 15 ways as a sum of consecutive naturals, for example, 317465 + ... + 341366.

It is an arithmetic number, because the mean of its divisors is an integer number (563301360).

Almost surely, 2^7873689281 is an apocalyptic number.

It is an amenable number.

7873689281 is a deficient number, since it is larger than the sum of its proper divisors (1139132479).

7873689281 is a wasteful number, since it uses less digits than its factorization.

7873689281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658904.

The product of its digits is 8128512, while the sum is 59.

The square root of 7873689281 is about 88733.8113742445. The cubic root of 7873689281 is about 1989.4182184400.

The spelling of 7873689281 in words is "seven billion, eight hundred seventy-three million, six hundred eighty-nine thousand, two hundred eighty-one".