6821873053 has 4 divisors (see below), whose sum is σ = 6937498080. Its totient is φ = 6706248028.

The previous prime is 6821873041. The next prime is 6821873059. The reversal of 6821873053 is 3503781286.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6821873053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6821873059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57812425 + ... + 57812542.

It is an arithmetic number, because the mean of its divisors is an integer number (1734374520).

Almost surely, 2^6821873053 is an apocalyptic number.

It is an amenable number.

6821873053 is a deficient number, since it is larger than the sum of its proper divisors (115625027).

6821873053 is a wasteful number, since it uses less digits than its factorization.

6821873053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115625026.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 6821873053 is about 82594.6308969294. The cubic root of 6821873053 is about 1896.5656383120.

The spelling of 6821873053 in words is "six billion, eight hundred twenty-one million, eight hundred seventy-three thousand, fifty-three".