41681989 has 2 divisors, whose sum is σ = 41681990. Its totient is φ = 41681988.

The previous prime is 41681963. The next prime is 41682001. The reversal of 41681989 is 98918614.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41177889 + 504100 = 6417^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 41681989 - 2⁹ = 41681477 is a prime.

It is a super-2 number, since 2×41681989² = 3474776413992242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41681389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20840994 + 20840995.

It is an arithmetic number, because the mean of its divisors is an integer number (20840995).

Almost surely, 2^41681989 is an apocalyptic number.

It is an amenable number.

41681989 is a deficient number, since it is larger than the sum of its proper divisors (1).

41681989 is an equidigital number, since it uses as much as digits as its factorization.

41681989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The square root of 41681989 is about 6456.1589974225. The cubic root of 41681989 is about 346.7231276176.

The spelling of 41681989 in words is "forty-one million, six hundred eighty-one thousand, nine hundred eighty-nine".