41165981 has 2 divisors, whose sum is σ = 41165982. Its totient is φ = 41165980.

The previous prime is 41165977. The next prime is 41165987. The reversal of 41165981 is 18956114.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23609881 + 17556100 = 4859^2 + 4190^2 .

It is a cyclic number.

It is not a de Polignac number, because 41165981 - 2² = 41165977 is a prime.

It is a super-2 number, since 2×41165981² = 3389275983384722, 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 (41165987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20582990 + 20582991.

It is an arithmetic number, because the mean of its divisors is an integer number (20582991).

Almost surely, 2^41165981 is an apocalyptic number.

It is an amenable number.

41165981 is a deficient number, since it is larger than the sum of its proper divisors (1).

41165981 is an equidigital number, since it uses as much as digits as its factorization.

41165981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 41165981 is about 6416.0720850065. The cubic root of 41165981 is about 345.2864134221.

The spelling of 41165981 in words is "forty-one million, one hundred sixty-five thousand, nine hundred eighty-one".