47547139 has 4 divisors (see below), whose sum is σ = 50049640. Its totient is φ = 45044640.

The previous prime is 47547119. The next prime is 47547151. The reversal of 47547139 is 93174574.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93174574 = 2 ⋅46587287.

It is a cyclic number.

It is not a de Polignac number, because 47547139 - 2¹⁷ = 47416067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47547119) 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, 1251222 + ... + 1251259.

It is an arithmetic number, because the mean of its divisors is an integer number (12512410).

Almost surely, 2^47547139 is an apocalyptic number.

47547139 is a deficient number, since it is larger than the sum of its proper divisors (2502501).

47547139 is a wasteful number, since it uses less digits than its factorization.

47547139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502500.

The product of its digits is 105840, while the sum is 40.

The square root of 47547139 is about 6895.4433505033. The cubic root of 47547139 is about 362.2775843711.

The spelling of 47547139 in words is "forty-seven million, five hundred forty-seven thousand, one hundred thirty-nine".