47858729 has 4 divisors (see below), whose sum is σ = 49509060. Its totient is φ = 46208400.

The previous prime is 47858717. The next prime is 47858731. The reversal of 47858729 is 92785874.

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 36481600 + 11377129 = 6040^2 + 3373^2 .

It is a cyclic number.

It is not a de Polignac number, because 47858729 - 2¹² = 47854633 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47858779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825122 + ... + 825179.

It is an arithmetic number, because the mean of its divisors is an integer number (12377265).

Almost surely, 2^47858729 is an apocalyptic number.

It is an amenable number.

47858729 is a deficient number, since it is larger than the sum of its proper divisors (1650331).

47858729 is a wasteful number, since it uses less digits than its factorization.

47858729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650330.

The product of its digits is 1128960, while the sum is 50.

The square root of 47858729 is about 6918.0003613761. Note that the first 3 decimals coincide. The cubic root of 47858729 is about 363.0672314868.

The spelling of 47858729 in words is "forty-seven million, eight hundred fifty-eight thousand, seven hundred twenty-nine".