81648003 has 4 divisors (see below), whose sum is σ = 108864008. Its totient is φ = 54432000.

The previous prime is 81647971. The next prime is 81648031. The reversal of 81648003 is 30084618.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 81648003 - 2⁵ = 81647971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81648043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13607998 + ... + 13608003.

It is an arithmetic number, because the mean of its divisors is an integer number (27216002).

Almost surely, 2^81648003 is an apocalyptic number.

81648003 is a deficient number, since it is larger than the sum of its proper divisors (27216005).

81648003 is a wasteful number, since it uses less digits than its factorization.

81648003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27216004.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 81648003 is about 9035.9284525720. The cubic root of 81648003 is about 433.8256128649.

The spelling of 81648003 in words is "eighty-one million, six hundred forty-eight thousand, three".