81483759 has 32 divisors (see below), whose sum is σ = 140912640. Its totient is φ = 45566496.

The previous prime is 81483749. The next prime is 81483791. The reversal of 81483759 is 95738418.

It is not a de Polignac number, because 81483759 - 2⁹ = 81483247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81483719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4297 + ... + 13469.

It is an arithmetic number, because the mean of its divisors is an integer number (4403520).

Almost surely, 2^81483759 is an apocalyptic number.

81483759 is a deficient number, since it is larger than the sum of its proper divisors (59428881).

81483759 is a wasteful number, since it uses less digits than its factorization.

81483759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9236 (or 9230 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 81483759 is about 9026.8354920204. The cubic root of 81483759 is about 433.5345215022.

The spelling of 81483759 in words is "eighty-one million, four hundred eighty-three thousand, seven hundred fifty-nine".