41781491 has 2 divisors, whose sum is σ = 41781492. Its totient is φ = 41781490.

The previous prime is 41781479. The next prime is 41781517. The reversal of 41781491 is 19418714.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41781491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (41781451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20890745 + 20890746.

It is an arithmetic number, because the mean of its divisors is an integer number (20890746).

Almost surely, 2^41781491 is an apocalyptic number.

41781491 is a deficient number, since it is larger than the sum of its proper divisors (1).

41781491 is an equidigital number, since it uses as much as digits as its factorization.

41781491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 35.

The square root of 41781491 is about 6463.8603790614. The cubic root of 41781491 is about 346.9988040720.

The spelling of 41781491 in words is "forty-one million, seven hundred eighty-one thousand, four hundred ninety-one".