3406981 has 2 divisors, whose sum is σ = 3406982. Its totient is φ = 3406980.

The previous prime is 3406979. The next prime is 3407003. The reversal of 3406981 is 1896043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3348900 + 58081 = 1830^2 + 241^2 .

It is an emirp because it is prime and its reverse (1896043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3406981 - 2¹ = 3406979 is a prime.

It is a super-2 number, since 2×3406981² = 23215039068722, which contains 22 as substring.

Together with 3406979, it forms a pair of twin primes.

3406981 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3406961) 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, 1703490 + 1703491.

It is an arithmetic number, because the mean of its divisors is an integer number (1703491).

Almost surely, 2^3406981 is an apocalyptic number.

It is an amenable number.

3406981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3406981 is an equidigital number, since it uses as much as digits as its factorization.

3406981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 3406981 is about 1845.8009101742. The cubic root of 3406981 is about 150.4723038920.

The spelling of 3406981 in words is "three million, four hundred six thousand, nine hundred eighty-one".