81896293 has 8 divisors (see below), whose sum is σ = 86882112. Its totient is φ = 76929216.

The previous prime is 81896273. The next prime is 81896317. The reversal of 81896293 is 39269818.

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

It is not a de Polignac number, because 81896293 - 2¹³ = 81888101 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 (81896233) 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, 4896 + ... + 13702.

It is an arithmetic number, because the mean of its divisors is an integer number (10860264).

Almost surely, 2^81896293 is an apocalyptic number.

It is an amenable number.

81896293 is a deficient number, since it is larger than the sum of its proper divisors (4985819).

81896293 is a wasteful number, since it uses less digits than its factorization.

81896293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9371.

The product of its digits is 186624, while the sum is 46.

The square root of 81896293 is about 9049.6570653257. The cubic root of 81896293 is about 434.2649196272.

The spelling of 81896293 in words is "eighty-one million, eight hundred ninety-six thousand, two hundred ninety-three".