81341863 has 2 divisors, whose sum is σ = 81341864. Its totient is φ = 81341862.

The previous prime is 81341837. The next prime is 81341867. The reversal of 81341863 is 36814318.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81341863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81341867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40670931 + 40670932.

It is an arithmetic number, because the mean of its divisors is an integer number (40670932).

Almost surely, 2^81341863 is an apocalyptic number.

81341863 is a deficient number, since it is larger than the sum of its proper divisors (1).

81341863 is an equidigital number, since it uses as much as digits as its factorization.

81341863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 81341863 is about 9018.9723915754. The cubic root of 81341863 is about 433.2827226231.

The spelling of 81341863 in words is "eighty-one million, three hundred forty-one thousand, eight hundred sixty-three".