6981553 has 4 divisors (see below), whose sum is σ = 7031920. Its totient is φ = 6931188.

The previous prime is 6981551. The next prime is 6981563. The reversal of 6981553 is 3551896.

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 6981553 - 2¹ = 6981551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6981551) 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, 24975 + ... + 25252.

It is an arithmetic number, because the mean of its divisors is an integer number (1757980).

Almost surely, 2^6981553 is an apocalyptic number.

It is an amenable number.

6981553 is a deficient number, since it is larger than the sum of its proper divisors (50367).

6981553 is a wasteful number, since it uses less digits than its factorization.

6981553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50366.

The product of its digits is 32400, while the sum is 37.

The square root of 6981553 is about 2642.2628559627. The cubic root of 6981553 is about 191.1249331113.

The spelling of 6981553 in words is "six million, nine hundred eighty-one thousand, five hundred fifty-three".