6873306521 has 2 divisors, whose sum is σ = 6873306522. Its totient is φ = 6873306520.

The previous prime is 6873306469. The next prime is 6873306527. The reversal of 6873306521 is 1256033786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4779786496 + 2093520025 = 69136^2 + 45755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6873306521 is a prime.

It is a super-3 number, since 3×6873306521³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (6873306527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3436653260 + 3436653261.

It is an arithmetic number, because the mean of its divisors is an integer number (3436653261).

Almost surely, 2^6873306521 is an apocalyptic number.

It is an amenable number.

6873306521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6873306521 is an equidigital number, since it uses as much as digits as its factorization.

6873306521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 6873306521 is about 82905.4070673319. The cubic root of 6873306521 is about 1901.3200910111.

The spelling of 6873306521 in words is "six billion, eight hundred seventy-three million, three hundred six thousand, five hundred twenty-one".