81300903 has 8 divisors (see below), whose sum is σ = 109886448. Its totient is φ = 53457984.

The previous prime is 81300881. The next prime is 81300911. The reversal of 81300903 is 30900318.

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

It is not a de Polignac number, because 81300903 - 2⁵ = 81300871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81300203) 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, 185400 + ... + 185837.

It is an arithmetic number, because the mean of its divisors is an integer number (13735806).

Almost surely, 2^81300903 is an apocalyptic number.

81300903 is a deficient number, since it is larger than the sum of its proper divisors (28585545).

81300903 is a wasteful number, since it uses less digits than its factorization.

81300903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371313.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 81300903 is about 9016.7013369635. The cubic root of 81300903 is about 433.2099833660.

The spelling of 81300903 in words is "eighty-one million, three hundred thousand, nine hundred three".