81073383 has 8 divisors (see below), whose sum is σ = 108150528. Its totient is φ = 54022584.

The previous prime is 81073381. The next prime is 81073397. The reversal of 81073383 is 38337018.

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

It is not a de Polignac number, because 81073383 - 2¹ = 81073381 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81073381) 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, 2316 + ... + 12942.

It is an arithmetic number, because the mean of its divisors is an integer number (13518816).

Almost surely, 2^81073383 is an apocalyptic number.

81073383 is a deficient number, since it is larger than the sum of its proper divisors (27077145).

81073383 is a wasteful number, since it uses less digits than its factorization.

81073383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13173.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 81073383 is about 9004.0759103864. The cubic root of 81073383 is about 432.8054941230.

The spelling of 81073383 in words is "eighty-one million, seventy-three thousand, three hundred eighty-three".