81760933 has 4 divisors (see below), whose sum is σ = 86064160. Its totient is φ = 77457708.

The previous prime is 81760909. The next prime is 81760951. The reversal of 81760933 is 33906718.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81760933 - 2⁹ = 81760421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81760892 and 81760901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81760993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2151585 + ... + 2151622.

It is an arithmetic number, because the mean of its divisors is an integer number (21516040).

Almost surely, 2^81760933 is an apocalyptic number.

It is an amenable number.

81760933 is a deficient number, since it is larger than the sum of its proper divisors (4303227).

81760933 is a wasteful number, since it uses less digits than its factorization.

81760933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303226.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 81760933 is about 9042.1752360812. The cubic root of 81760933 is about 434.0255334776.

The spelling of 81760933 in words is "eighty-one million, seven hundred sixty thousand, nine hundred thirty-three".