56081729 has 8 divisors (see below), whose sum is σ = 61234272. Its totient is φ = 50938240.

The previous prime is 56081723. The next prime is 56081777. The reversal of 56081729 is 92718065.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56081729 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56081692 and 56081701.

It is not an unprimeable number, because it can be changed into a prime (56081723) 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, 23537 + ... + 25809.

It is an arithmetic number, because the mean of its divisors is an integer number (7654284).

Almost surely, 2^56081729 is an apocalyptic number.

It is an amenable number.

56081729 is a deficient number, since it is larger than the sum of its proper divisors (5152543).

56081729 is a wasteful number, since it uses less digits than its factorization.

56081729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 56081729 is about 7488.7735310931. The cubic root of 56081729 is about 382.7722674553.

It can be divided in two parts, 5608 and 1729, that added together give a palindrome (7337).

The spelling of 56081729 in words is "fifty-six million, eighty-one thousand, seven hundred twenty-nine".