47891705 has 4 divisors (see below), whose sum is σ = 57470052. Its totient is φ = 38313360.

The previous prime is 47891689. The next prime is 47891707. The reversal of 47891705 is 50719874.

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 29116816 + 18774889 = 5396^2 + 4333^2 .

It is not a de Polignac number, because 47891705 - 2⁴ = 47891689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47891707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4789166 + ... + 4789175.

It is an arithmetic number, because the mean of its divisors is an integer number (14367513).

Almost surely, 2^47891705 is an apocalyptic number.

It is an amenable number.

47891705 is a deficient number, since it is larger than the sum of its proper divisors (9578347).

47891705 is an equidigital number, since it uses as much as digits as its factorization.

47891705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9578346.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 47891705 is about 6920.3832986331. The cubic root of 47891705 is about 363.1506001604.

The spelling of 47891705 in words is "forty-seven million, eight hundred ninety-one thousand, seven hundred five".