81363417 has 8 divisors (see below), whose sum is σ = 108796800. Its totient is φ = 54086160.

The previous prime is 81363413. The next prime is 81363461. The reversal of 81363417 is 71436318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81363417 - 2² = 81363413 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81363413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37809 + ... + 39902.

It is an arithmetic number, because the mean of its divisors is an integer number (13599600).

Almost surely, 2^81363417 is an apocalyptic number.

It is an amenable number.

81363417 is a deficient number, since it is larger than the sum of its proper divisors (27433383).

81363417 is a wasteful number, since it uses less digits than its factorization.

81363417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78063.

The product of its digits is 12096, while the sum is 33.

The square root of 81363417 is about 9020.1672379175. The cubic root of 81363417 is about 433.3209897207.

The spelling of 81363417 in words is "eighty-one million, three hundred sixty-three thousand, four hundred seventeen".