6981161 has 4 divisors (see below), whose sum is σ = 7615824. Its totient is φ = 6346500.

The previous prime is 6981157. The next prime is 6981181. The reversal of 6981161 is 1611896.

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 6981161 - 2² = 6981157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6981181) 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, 317315 + ... + 317336.

It is an arithmetic number, because the mean of its divisors is an integer number (1903956).

Almost surely, 2^6981161 is an apocalyptic number.

It is an amenable number.

6981161 is a deficient number, since it is larger than the sum of its proper divisors (634663).

6981161 is a wasteful number, since it uses less digits than its factorization.

6981161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634662.

The product of its digits is 2592, while the sum is 32.

The square root of 6981161 is about 2642.1886760790. The cubic root of 6981161 is about 191.1213559523.

The spelling of 6981161 in words is "six million, nine hundred eighty-one thousand, one hundred sixty-one".