41971781 has 2 divisors, whose sum is σ = 41971782. Its totient is φ = 41971780.

The previous prime is 41971771. The next prime is 41971819. The reversal of 41971781 is 18717914.

It is a happy number.

It is an a-pointer prime, because the next prime (41971819) can be obtained adding 41971781 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35164900 + 6806881 = 5930^2 + 2609^2 .

It is a cyclic number.

It is not a de Polignac number, because 41971781 - 2⁶ = 41971717 is a prime.

It is a super-2 number, since 2×41971781² = 3523260800623922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41971771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20985890 + 20985891.

It is an arithmetic number, because the mean of its divisors is an integer number (20985891).

Almost surely, 2^41971781 is an apocalyptic number.

It is an amenable number.

41971781 is a deficient number, since it is larger than the sum of its proper divisors (1).

41971781 is an equidigital number, since it uses as much as digits as its factorization.

41971781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 38.

The square root of 41971781 is about 6478.5631894734. The cubic root of 41971781 is about 347.5247978439.

The spelling of 41971781 in words is "forty-one million, nine hundred seventy-one thousand, seven hundred eighty-one".