81888003 has 40 divisors (see below), whose sum is σ = 126382080. Its totient is φ = 52818480.

The previous prime is 81887977. The next prime is 81888007. The reversal of 81888003 is 30088818.

81888003 is a nontrivial binomial coefficient, being equal to C(12798, 2).

It is not a de Polignac number, because 81888003 - 2⁸ = 81887747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81888007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 428638 + ... + 428828.

It is an arithmetic number, because the mean of its divisors is an integer number (3159552).

Almost surely, 2^81888003 is an apocalyptic number.

81888003 is the 12797-th triangular number and also the 6399-th hexagonal number.

81888003 is a deficient number, since it is larger than the sum of its proper divisors (44494077).

81888003 is a wasteful number, since it uses less digits than its factorization.

81888003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 81888003 is about 9049.1990253282. The cubic root of 81888003 is about 434.2502662262.

The spelling of 81888003 in words is "eighty-one million, eight hundred eighty-eight thousand, three".