55732729 has 8 divisors (see below), whose sum is σ = 60164552. Its totient is φ = 51321600.

The previous prime is 55732727. The next prime is 55732759. The reversal of 55732729 is 92723755.

It can be written as a sum of positive squares in 4 ways, for example, as 3892729 + 51840000 = 1973^2 + 7200^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55732729 - 2¹ = 55732727 is a prime.

It is a super-2 number, since 2×55732729² = 6212274163574882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55732691 and 55732700.

It is not an unprimeable number, because it can be changed into a prime (55732727) 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, 679 + ... + 10579.

It is an arithmetic number, because the mean of its divisors is an integer number (7520569).

Almost surely, 2^55732729 is an apocalyptic number.

It is an amenable number.

55732729 is a deficient number, since it is larger than the sum of its proper divisors (4431823).

55732729 is a wasteful number, since it uses less digits than its factorization.

55732729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10347.

The product of its digits is 132300, while the sum is 40.

The square root of 55732729 is about 7465.4356202435. The cubic root of 55732729 is about 381.9766096804.

The spelling of 55732729 in words is "fifty-five million, seven hundred thirty-two thousand, seven hundred twenty-nine".