47686729 has 2 divisors, whose sum is σ = 47686730. Its totient is φ = 47686728.

The previous prime is 47686721. The next prime is 47686733. The reversal of 47686729 is 92768674.

47686729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47610000 + 76729 = 6900^2 + 277^2 .

It is a cyclic number.

It is not a de Polignac number, because 47686729 - 2³ = 47686721 is a prime.

It is not a weakly prime, because it can be changed into another prime (47686721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23843364 + 23843365.

It is an arithmetic number, because the mean of its divisors is an integer number (23843365).

Almost surely, 2^47686729 is an apocalyptic number.

It is an amenable number.

47686729 is a deficient number, since it is larger than the sum of its proper divisors (1).

47686729 is an equidigital number, since it uses as much as digits as its factorization.

47686729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 49.

The square root of 47686729 is about 6905.5578340928. The cubic root of 47686729 is about 362.6317656538.

The spelling of 47686729 in words is "forty-seven million, six hundred eighty-six thousand, seven hundred twenty-nine".