47240709 has 16 divisors (see below), whose sum is σ = 64468800. Its totient is φ = 30761856.

The previous prime is 47240693. The next prime is 47240717. The reversal of 47240709 is 90704274.

It is not a de Polignac number, because 47240709 - 2⁴ = 47240693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47240709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47240309) 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 15 ways as a sum of consecutive naturals, for example, 22882 + ... + 24860.

It is an arithmetic number, because the mean of its divisors is an integer number (4029300).

Almost surely, 2^47240709 is an apocalyptic number.

It is an amenable number.

47240709 is a deficient number, since it is larger than the sum of its proper divisors (17228091).

47240709 is a wasteful number, since it uses less digits than its factorization.

47240709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 47240709 is about 6873.1876884019. The cubic root of 47240709 is about 361.4976421663.

The spelling of 47240709 in words is "forty-seven million, two hundred forty thousand, seven hundred nine".