47509641 has 12 divisors (see below), whose sum is σ = 69566068. Its totient is φ = 31238784.

The previous prime is 47509619. The next prime is 47509661. The reversal of 47509641 is 14690574.

47509641 is a `hidden beast` number, since 4 + 7 + 5 + 0 + 9 + 641 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37454400 + 10055241 = 6120^2 + 3171^2 .

It is not a de Polignac number, because 47509641 - 2⁹ = 47509129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47509596 and 47509605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47509601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35500 + ... + 36813.

Almost surely, 2^47509641 is an apocalyptic number.

It is an amenable number.

47509641 is a deficient number, since it is larger than the sum of its proper divisors (22056427).

47509641 is a wasteful number, since it uses less digits than its factorization.

47509641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72392 (or 72389 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 47509641 is about 6892.7237722108. The cubic root of 47509641 is about 362.1823227150.

The spelling of 47509641 in words is "forty-seven million, five hundred nine thousand, six hundred forty-one".