81463 has 2 divisors, whose sum is σ = 81464. Its totient is φ = 81462.

The previous prime is 81457. The next prime is 81509. The reversal of 81463 is 36418.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40731 + 40732.

It is an arithmetic number, because the mean of its divisors is an integer number (40732).

2⁸¹⁴⁶³ is an apocalyptic number.

81463 is a deficient number, since it is larger than the sum of its proper divisors (1).

81463 is an equidigital number, since it uses as much as digits as its factorization.

81463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 81463 is about 285.4172384422. The cubic root of 81463 is about 43.3497702273.

The spelling of 81463 in words is "eighty-one thousand, four hundred sixty-three".