47472945 has 48 divisors (see below), whose sum is σ = 83869632. Its totient is φ = 22913280.

The previous prime is 47472941. The next prime is 47472977. The reversal of 47472945 is 54927474.

It is not a de Polignac number, because 47472945 - 2² = 47472941 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 47472897 and 47472906.

It is not an unprimeable number, because it can be changed into a prime (47472941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 154482 + ... + 154788.

It is an arithmetic number, because the mean of its divisors is an integer number (1747284).

Almost surely, 2^47472945 is an apocalyptic number.

It is an amenable number.

47472945 is a deficient number, since it is larger than the sum of its proper divisors (36396687).

47472945 is a wasteful number, since it uses less digits than its factorization.

47472945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 389 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 47472945 is about 6890.0613204818. The cubic root of 47472945 is about 362.0890499563.

The spelling of 47472945 in words is "forty-seven million, four hundred seventy-two thousand, nine hundred forty-five".