47447885 has 4 divisors (see below), whose sum is σ = 56937468. Its totient is φ = 37958304.

The previous prime is 47447861. The next prime is 47447899. The reversal of 47447885 is 58874474.

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 8684809 + 38763076 = 2947^2 + 6226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47447885 is a prime.

It is a Duffinian number.

It is a congruent 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, 4744784 + ... + 4744793.

It is an arithmetic number, because the mean of its divisors is an integer number (14234367).

Almost surely, 2^47447885 is an apocalyptic number.

It is an amenable number.

47447885 is a deficient number, since it is larger than the sum of its proper divisors (9489583).

47447885 is an equidigital number, since it uses as much as digits as its factorization.

47447885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9489582.

The product of its digits is 1003520, while the sum is 47.

The square root of 47447885 is about 6888.2425189594. The cubic root of 47447885 is about 362.0253255991.

The spelling of 47447885 in words is "forty-seven million, four hundred forty-seven thousand, eight hundred eighty-five".