6981533 has 4 divisors (see below), whose sum is σ = 7518588. Its totient is φ = 6444480.

The previous prime is 6981503. The next prime is 6981539. The reversal of 6981533 is 3351896.

6981533 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 964324 + 6017209 = 982^2 + 2453^2 .

It is a cyclic number.

It is not a de Polignac number, because 6981533 - 2⁸ = 6981277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6981493 and 6981502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6981539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268508 + ... + 268533.

It is an arithmetic number, because the mean of its divisors is an integer number (1879647).

Almost surely, 2^6981533 is an apocalyptic number.

It is an amenable number.

6981533 is a deficient number, since it is larger than the sum of its proper divisors (537055).

6981533 is a wasteful number, since it uses less digits than its factorization.

6981533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537054.

The product of its digits is 19440, while the sum is 35.

The square root of 6981533 is about 2642.2590713251. The cubic root of 6981533 is about 191.1247506065.

The spelling of 6981533 in words is "six million, nine hundred eighty-one thousand, five hundred thirty-three".