47791805 has 4 divisors (see below), whose sum is σ = 57350172. Its totient is φ = 38233440.

The previous prime is 47791789. The next prime is 47791819. The reversal of 47791805 is 50819774.

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 5943844 + 41847961 = 2438^2 + 6469^2 .

It is not a de Polignac number, because 47791805 - 2⁴ = 47791789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4779176 + ... + 4779185.

It is an arithmetic number, because the mean of its divisors is an integer number (14337543).

Almost surely, 2^47791805 is an apocalyptic number.

It is an amenable number.

47791805 is a deficient number, since it is larger than the sum of its proper divisors (9558367).

47791805 is an equidigital number, since it uses as much as digits as its factorization.

47791805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9558366.

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

The square root of 47791805 is about 6913.1617223959. The cubic root of 47791805 is about 362.8979189670.

The spelling of 47791805 in words is "forty-seven million, seven hundred ninety-one thousand, eight hundred five".