81748803 has 8 divisors (see below), whose sum is σ = 109080400. Its totient is φ = 54458208.

The previous prime is 81748781. The next prime is 81748813. The reversal of 81748803 is 30884718.

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

It is not a de Polignac number, because 81748803 - 2¹³ = 81740611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81748813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5248 + ... + 13821.

It is an arithmetic number, because the mean of its divisors is an integer number (13635050).

Almost surely, 2^81748803 is an apocalyptic number.

81748803 is a deficient number, since it is larger than the sum of its proper divisors (27331597).

81748803 is a wasteful number, since it uses less digits than its factorization.

81748803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20501.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 81748803 is about 9041.5044655190. The cubic root of 81748803 is about 434.0040684987.

The spelling of 81748803 in words is "eighty-one million, seven hundred forty-eight thousand, eight hundred three".