47879729 has 2 divisors, whose sum is σ = 47879730. Its totient is φ = 47879728.

The previous prime is 47879687. The next prime is 47879737. The reversal of 47879729 is 92797874.

47879729 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., 47679025 + 200704 = 6905^2 + 448^2 .

It is a cyclic number.

It is not a de Polignac number, because 47879729 - 2²⁰ = 46831153 is a prime.

It is a super-2 number, since 2×47879729² = 4584936898226882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47879789) 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, 23939864 + 23939865.

It is an arithmetic number, because the mean of its divisors is an integer number (23939865).

Almost surely, 2^47879729 is an apocalyptic number.

It is an amenable number.

47879729 is a deficient number, since it is larger than the sum of its proper divisors (1).

47879729 is an equidigital number, since it uses as much as digits as its factorization.

47879729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 53.

The square root of 47879729 is about 6919.5179745413. The cubic root of 47879729 is about 363.1203273177.

The spelling of 47879729 in words is "forty-seven million, eight hundred seventy-nine thousand, seven hundred twenty-nine".