6820987533 has 4 divisors (see below), whose sum is σ = 9094650048. Its totient is φ = 4547325020.

The previous prime is 6820987519. The next prime is 6820987549. The reversal of 6820987533 is 3357890286.

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 not a de Polignac number, because 6820987533 - 2²¹ = 6818890381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820987513) 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, 1136831253 + ... + 1136831258.

It is an arithmetic number, because the mean of its divisors is an integer number (2273662512).

Almost surely, 2^6820987533 is an apocalyptic number.

It is an amenable number.

6820987533 is a deficient number, since it is larger than the sum of its proper divisors (2273662515).

6820987533 is a wasteful number, since it uses less digits than its factorization.

6820987533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273662514.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The square root of 6820987533 is about 82589.2700839522. The cubic root of 6820987533 is about 1896.4835728995.

The spelling of 6820987533 in words is "six billion, eight hundred twenty million, nine hundred eighty-seven thousand, five hundred thirty-three".