47705729 has 4 divisors (see below), whose sum is σ = 48054084. Its totient is φ = 47357376.

The previous prime is 47705701. The next prime is 47705737. The reversal of 47705729 is 92750774.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40132225 + 7573504 = 6335^2 + 2752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47705729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47705759) 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, 173972 + ... + 174245.

It is an arithmetic number, because the mean of its divisors is an integer number (12013521).

Almost surely, 2^47705729 is an apocalyptic number.

It is an amenable number.

47705729 is a deficient number, since it is larger than the sum of its proper divisors (348355).

47705729 is a wasteful number, since it uses less digits than its factorization.

47705729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348354.

The product of its (nonzero) digits is 123480, while the sum is 41.

The square root of 47705729 is about 6906.9334005766. The cubic root of 47705729 is about 362.6799208312.

The spelling of 47705729 in words is "forty-seven million, seven hundred five thousand, seven hundred twenty-nine".