41781791 has 2 divisors, whose sum is σ = 41781792. Its totient is φ = 41781790.

The previous prime is 41781787. The next prime is 41781797. The reversal of 41781791 is 19718714.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 41781791 - 2² = 41781787 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41781797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20890895 + 20890896.

It is an arithmetic number, because the mean of its divisors is an integer number (20890896).

Almost surely, 2^41781791 is an apocalyptic number.

41781791 is a deficient number, since it is larger than the sum of its proper divisors (1).

41781791 is an equidigital number, since it uses as much as digits as its factorization.

41781791 is an odious number, because the sum of its binary digits is odd.

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

The square root of 41781791 is about 6463.8835849665. The cubic root of 41781791 is about 346.9996345784. Note that the first 3 decimals are identical.

The spelling of 41781791 in words is "forty-one million, seven hundred eighty-one thousand, seven hundred ninety-one".