47131705 has 4 divisors (see below), whose sum is σ = 56558052. Its totient is φ = 37705360.

The previous prime is 47131697. The next prime is 47131789. The reversal of 47131705 is 50713174.

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 32569849 + 14561856 = 5707^2 + 3816^2 .

It is not a de Polignac number, because 47131705 - 2³ = 47131697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4713166 + ... + 4713175.

It is an arithmetic number, because the mean of its divisors is an integer number (14139513).

Almost surely, 2^47131705 is an apocalyptic number.

It is an amenable number.

47131705 is a deficient number, since it is larger than the sum of its proper divisors (9426347).

47131705 is an equidigital number, since it uses as much as digits as its factorization.

47131705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9426346.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 47131705 is about 6865.2534548988. The cubic root of 47131705 is about 361.2193861423.

Adding to 47131705 its reverse (50713174), we get a palindrome (97844879).

The spelling of 47131705 in words is "forty-seven million, one hundred thirty-one thousand, seven hundred five".