47409945 has 16 divisors (see below), whose sum is σ = 82752192. Its totient is φ = 22986560.

The previous prime is 47409919. The next prime is 47409949. The reversal of 47409945 is 54990474.

It is not a de Polignac number, because 47409945 - 2⁸ = 47409689 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 47409897 and 47409906.

It is not an unprimeable number, because it can be changed into a prime (47409949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143502 + ... + 143831.

It is an arithmetic number, because the mean of its divisors is an integer number (5172012).

Almost surely, 2^47409945 is an apocalyptic number.

It is an amenable number.

47409945 is a deficient number, since it is larger than the sum of its proper divisors (35342247).

47409945 is a wasteful number, since it uses less digits than its factorization.

47409945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287352.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 47409945 is about 6885.4880001348. The cubic root of 47409945 is about 361.9288063448.

The spelling of 47409945 in words is "forty-seven million, four hundred nine thousand, nine hundred forty-five".