47945865 has 32 divisors (see below), whose sum is σ = 88615296. Its totient is φ = 21877760.

The previous prime is 47945861. The next prime is 47945879. The reversal of 47945865 is 56854974.

47945865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 47945865 - 2² = 47945861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47945861) 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 31 ways as a sum of consecutive naturals, for example, 5742 + ... + 11351.

It is an arithmetic number, because the mean of its divisors is an integer number (2769228).

Almost surely, 2^47945865 is an apocalyptic number.

It is an amenable number.

47945865 is a deficient number, since it is larger than the sum of its proper divisors (40669431).

47945865 is a wasteful number, since it uses less digits than its factorization.

47945865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17129.

The product of its digits is 1209600, while the sum is 48.

The square root of 47945865 is about 6924.2952710005. The cubic root of 47945865 is about 363.2874424173.

The spelling of 47945865 in words is "forty-seven million, nine hundred forty-five thousand, eight hundred sixty-five".