41989681 has 2 divisors, whose sum is σ = 41989682. Its totient is φ = 41989680.

The previous prime is 41989663. The next prime is 41989687. The reversal of 41989681 is 18698914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40449600 + 1540081 = 6360^2 + 1241^2 .

It is a cyclic number.

It is not a de Polignac number, because 41989681 - 2⁹ = 41989169 is a prime.

It is a super-2 number, since 2×41989681² = 3526266620963522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (41989687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20994840 + 20994841.

It is an arithmetic number, because the mean of its divisors is an integer number (20994841).

Almost surely, 2^41989681 is an apocalyptic number.

It is an amenable number.

41989681 is a deficient number, since it is larger than the sum of its proper divisors (1).

41989681 is an equidigital number, since it uses as much as digits as its factorization.

41989681 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 41989681 is about 6479.9445213674. The cubic root of 41989681 is about 347.5741946022.

It can be divided in two parts, 419 and 89681, that added together give a triangular number (90100 = T₄₂₄).

The spelling of 41989681 in words is "forty-one million, nine hundred eighty-nine thousand, six hundred eighty-one".