6179981 has 2 divisors, whose sum is σ = 6179982. Its totient is φ = 6179980.

The previous prime is 6179969. The next prime is 6179989. The reversal of 6179981 is 1899716.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5593225 + 586756 = 2365^2 + 766^2 .

It is a cyclic number.

It is not a de Polignac number, because 6179981 - 2¹⁰ = 6178957 is a prime.

It is a super-2 number, since 2×6179981² = 76384330320722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6179989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3089990 + 3089991.

It is an arithmetic number, because the mean of its divisors is an integer number (3089991).

Almost surely, 2^6179981 is an apocalyptic number.

It is an amenable number.

6179981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6179981 is an equidigital number, since it uses as much as digits as its factorization.

6179981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 41.

The square root of 6179981 is about 2485.9567574678. The cubic root of 6179981 is about 183.5111175321.

The spelling of 6179981 in words is "six million, one hundred seventy-nine thousand, nine hundred eighty-one".