6180991 has 2 divisors, whose sum is σ = 6180992. Its totient is φ = 6180990.

The previous prime is 6180989. The next prime is 6181001. The reversal of 6180991 is 1990816.

6180991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6180991 - 2¹ = 6180989 is a prime.

Together with 6180989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6180901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3090495 + 3090496.

It is an arithmetic number, because the mean of its divisors is an integer number (3090496).

Almost surely, 2^6180991 is an apocalyptic number.

6180991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6180991 is an equidigital number, since it uses as much as digits as its factorization.

6180991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 6180991 is about 2486.1598902725. The cubic root of 6180991 is about 183.5211141179.

The spelling of 6180991 in words is "six million, one hundred eighty thousand, nine hundred ninety-one".