47168729 has 2 divisors, whose sum is σ = 47168730. Its totient is φ = 47168728.

The previous prime is 47168713. The next prime is 47168741. The reversal of 47168729 is 92786174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40615129 + 6553600 = 6373^2 + 2560^2 .

It is a cyclic number.

It is not a de Polignac number, because 47168729 - 2⁴ = 47168713 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47168729.

It is not a weakly prime, because it can be changed into another prime (47168749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23584364 + 23584365.

It is an arithmetic number, because the mean of its divisors is an integer number (23584365).

Almost surely, 2^47168729 is an apocalyptic number.

It is an amenable number.

47168729 is a deficient number, since it is larger than the sum of its proper divisors (1).

47168729 is an equidigital number, since it uses as much as digits as its factorization.

47168729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 47168729 is about 6867.9494028422. The cubic root of 47168729 is about 361.3139458885.

The spelling of 47168729 in words is "forty-seven million, one hundred sixty-eight thousand, seven hundred twenty-nine".