47489709 has 4 divisors (see below), whose sum is σ = 63319616. Its totient is φ = 31659804.

The previous prime is 47489707. The next prime is 47489731. The reversal of 47489709 is 90798474.

It is a happy number.

47489709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 47489709 - 2¹ = 47489707 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47489707) 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 in 3 ways as a sum of consecutive naturals, for example, 7914949 + ... + 7914954.

It is an arithmetic number, because the mean of its divisors is an integer number (15829904).

Almost surely, 2^47489709 is an apocalyptic number.

It is an amenable number.

47489709 is a deficient number, since it is larger than the sum of its proper divisors (15829907).

47489709 is a wasteful number, since it uses less digits than its factorization.

47489709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15829906.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 47489709 is about 6891.2777479942. The cubic root of 47489709 is about 362.1316661347.

The spelling of 47489709 in words is "forty-seven million, four hundred eighty-nine thousand, seven hundred nine".