6981181 has 2 divisors, whose sum is σ = 6981182. Its totient is φ = 6981180.

The previous prime is 6981157. The next prime is 6981211. The reversal of 6981181 is 1811896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6579225 + 401956 = 2565^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 6981181 - 2⁷ = 6981053 is a prime.

It is a super-2 number, since 2×6981181² = 97473776309522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6982181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3490590 + 3490591.

It is an arithmetic number, because the mean of its divisors is an integer number (3490591).

Almost surely, 2^6981181 is an apocalyptic number.

It is an amenable number.

6981181 is a deficient number, since it is larger than the sum of its proper divisors (1).

6981181 is an equidigital number, since it uses as much as digits as its factorization.

6981181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 34.

The square root of 6981181 is about 2642.1924608173. The cubic root of 6981181 is about 191.1215384637.

The spelling of 6981181 in words is "six million, nine hundred eighty-one thousand, one hundred eighty-one".