6998553 has 6 divisors (see below), whose sum is σ = 10109034. Its totient is φ = 4665696.

The previous prime is 6998533. The next prime is 6998561. The reversal of 6998553 is 3558996.

6998553 is a `hidden beast` number, since 6 + 9 + 98 + 553 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3583449 + 3415104 = 1893^2 + 1848^2 .

It is not a de Polignac number, because 6998553 - 2⁶ = 6998489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6998499 and 6998508.

It is not an unprimeable number, because it can be changed into a prime (6998533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 388800 + ... + 388817.

It is an arithmetic number, because the mean of its divisors is an integer number (1684839).

Almost surely, 2^6998553 is an apocalyptic number.

It is an amenable number.

6998553 is a deficient number, since it is larger than the sum of its proper divisors (3110481).

6998553 is a wasteful number, since it uses less digits than its factorization.

6998553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777623 (or 777620 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 6998553 is about 2645.4778396350. The cubic root of 6998553 is about 191.2799363621.

Subtracting from 6998553 its product of digits (291600), we obtain a triangular number (6706953 = T₃₆₆₂).

The spelling of 6998553 in words is "six million, nine hundred ninety-eight thousand, five hundred fifty-three".