81450803 has 16 divisors (see below), whose sum is σ = 94832640. Its totient is φ = 68518656.

The previous prime is 81450793. The next prime is 81450823. The reversal of 81450803 is 30805418.

It is a cyclic number.

It is not a de Polignac number, because 81450803 - 2¹⁰ = 81449779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81450823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93950 + ... + 94812.

It is an arithmetic number, because the mean of its divisors is an integer number (5927040).

Almost surely, 2^81450803 is an apocalyptic number.

81450803 is a deficient number, since it is larger than the sum of its proper divisors (13381837).

81450803 is a wasteful number, since it uses less digits than its factorization.

81450803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 81450803 is about 9025.0098614905. The cubic root of 81450803 is about 433.4760661303.

The spelling of 81450803 in words is "eighty-one million, four hundred fifty thousand, eight hundred three".