3169981 has 2 divisors, whose sum is σ = 3169982. Its totient is φ = 3169980.

The previous prime is 3169963. The next prime is 3170039. The reversal of 3169981 is 1899613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3115225 + 54756 = 1765^2 + 234^2 .

It is a cyclic number.

It is not a de Polignac number, because 3169981 - 2⁵ = 3169949 is a prime.

It is a super-2 number, since 2×3169981² = 20097559080722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3169981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3169921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1584990 + 1584991.

It is an arithmetic number, because the mean of its divisors is an integer number (1584991).

Almost surely, 2^3169981 is an apocalyptic number.

It is an amenable number.

3169981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3169981 is an equidigital number, since it uses as much as digits as its factorization.

3169981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 37.

The square root of 3169981 is about 1780.4440457369. Note that the first 3 decimals coincide. The cubic root of 3169981 is about 146.8990159009.

The spelling of 3169981 in words is "three million, one hundred sixty-nine thousand, nine hundred eighty-one".