81267463 has 16 divisors (see below), whose sum is σ = 88957440. Its totient is φ = 73938816.

The previous prime is 81267443. The next prime is 81267467. The reversal of 81267463 is 36476218.

It is a cyclic number.

It is not a de Polignac number, because 81267463 - 2¹³ = 81259271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81267467) 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 in 15 ways as a sum of consecutive naturals, for example, 77698 + ... + 78736.

It is an arithmetic number, because the mean of its divisors is an integer number (5559840).

Almost surely, 2^81267463 is an apocalyptic number.

81267463 is a deficient number, since it is larger than the sum of its proper divisors (7689977).

81267463 is a wasteful number, since it uses less digits than its factorization.

81267463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206.

The product of its digits is 48384, while the sum is 37.

The square root of 81267463 is about 9014.8468095692. The cubic root of 81267463 is about 433.1505804651.

The spelling of 81267463 in words is "eighty-one million, two hundred sixty-seven thousand, four hundred sixty-three".