81088903 has 12 divisors (see below), whose sum is σ = 97810320. Its totient is φ = 65844576.

The previous prime is 81088883. The next prime is 81088907. The reversal of 81088903 is 30988018.

It is not a de Polignac number, because 81088903 - 2⁵ = 81088871 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 (81088907) 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 11 ways as a sum of consecutive naturals, for example, 13518 + ... + 18571.

It is an arithmetic number, because the mean of its divisors is an integer number (8150860).

Almost surely, 2^81088903 is an apocalyptic number.

81088903 is a deficient number, since it is larger than the sum of its proper divisors (16721417).

81088903 is a wasteful number, since it uses less digits than its factorization.

81088903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32134 (or 32115 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 81088903 is about 9004.9377010616. The cubic root of 81088903 is about 432.8331098971.

The spelling of 81088903 in words is "eighty-one million, eighty-eight thousand, nine hundred three".