56705729 has 2 divisors, whose sum is σ = 56705730. Its totient is φ = 56705728.

The previous prime is 56705717. The next prime is 56705749. The reversal of 56705729 is 92750765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38626225 + 18079504 = 6215^2 + 4252^2 .

It is a cyclic number.

It is not a de Polignac number, because 56705729 - 2²⁰ = 55657153 is a prime.

It is a Chen prime.

It is equal to p_3377966 and since 56705729 and 3377966 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56705749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28352864 + 28352865.

It is an arithmetic number, because the mean of its divisors is an integer number (28352865).

Almost surely, 2^56705729 is an apocalyptic number.

It is an amenable number.

56705729 is a deficient number, since it is larger than the sum of its proper divisors (1).

56705729 is an equidigital number, since it uses as much as digits as its factorization.

56705729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 56705729 is about 7530.3206439036. The cubic root of 56705729 is about 384.1866881046.

The spelling of 56705729 in words is "fifty-six million, seven hundred five thousand, seven hundred twenty-nine".