41197781 has 2 divisors, whose sum is σ = 41197782. Its totient is φ = 41197780.

The previous prime is 41197771. The next prime is 41197811. The reversal of 41197781 is 18779114.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41075281 + 122500 = 6409^2 + 350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41197781 is a prime.

It is a super-2 number, since 2×41197781² = 3394514318647922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41197721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20598890 + 20598891.

It is an arithmetic number, because the mean of its divisors is an integer number (20598891).

Almost surely, 2^41197781 is an apocalyptic number.

It is an amenable number.

41197781 is a deficient number, since it is larger than the sum of its proper divisors (1).

41197781 is an equidigital number, since it uses as much as digits as its factorization.

41197781 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 41197781 is about 6418.5497583177. The cubic root of 41197781 is about 345.3752997759.

The spelling of 41197781 in words is "forty-one million, one hundred ninety-seven thousand, seven hundred eighty-one".