47171745 has 12 divisors (see below), whose sum is σ = 81764436. Its totient is φ = 25158240.

The previous prime is 47171741. The next prime is 47171767. The reversal of 47171745 is 54717174.

47171745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 20142144 + 27029601 = 4488^2 + 5199^2 .

It is not a de Polignac number, because 47171745 - 2² = 47171741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47171741) 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 11 ways as a sum of consecutive naturals, for example, 524086 + ... + 524175.

It is an arithmetic number, because the mean of its divisors is an integer number (6813703).

Almost surely, 2^47171745 is an apocalyptic number.

47171745 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47171745 is a deficient number, since it is larger than the sum of its proper divisors (34592691).

47171745 is a wasteful number, since it uses less digits than its factorization.

47171745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048272 (or 1048269 counting only the distinct ones).

The product of its digits is 27440, while the sum is 36.

The square root of 47171745 is about 6868.1689699657. The cubic root of 47171745 is about 361.3216466092.

The spelling of 47171745 in words is "forty-seven million, one hundred seventy-one thousand, seven hundred forty-five".