3409981 has 2 divisors, whose sum is σ = 3409982. Its totient is φ = 3409980.

The previous prime is 3409937. The next prime is 3409999. The reversal of 3409981 is 1899043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3006756 + 403225 = 1734^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 3409981 - 2⁷ = 3409853 is a prime.

It is a super-2 number, since 2×3409981² = 23255940840722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3409481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1704990 + 1704991.

It is an arithmetic number, because the mean of its divisors is an integer number (1704991).

Almost surely, 2^3409981 is an apocalyptic number.

It is an amenable number.

3409981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3409981 is an equidigital number, since it uses as much as digits as its factorization.

3409981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 3409981 is about 1846.6133867163. The cubic root of 3409981 is about 150.5164568120.

The spelling of 3409981 in words is "three million, four hundred nine thousand, nine hundred eighty-one".