81914303 has 4 divisors (see below), whose sum is σ = 82194168. Its totient is φ = 81634440.

The previous prime is 81914281. The next prime is 81914311. The reversal of 81914303 is 30341918.

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

It is a cyclic number.

It is not a de Polignac number, because 81914303 - 2¹⁸ = 81652159 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 (81914323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139493 + ... + 140078.

It is an arithmetic number, because the mean of its divisors is an integer number (20548542).

Almost surely, 2^81914303 is an apocalyptic number.

81914303 is a deficient number, since it is larger than the sum of its proper divisors (279865).

81914303 is a wasteful number, since it uses less digits than its factorization.

81914303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279864.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 81914303 is about 9050.6520759556. The cubic root of 81914303 is about 434.2967506893.

The spelling of 81914303 in words is "eighty-one million, nine hundred fourteen thousand, three hundred three".