47091609 has 6 divisors (see below), whose sum is σ = 68021226. Its totient is φ = 31394400.

The previous prime is 47091607. The next prime is 47091631. The reversal of 47091609 is 90619074.

47091609 is a `hidden beast` number, since 47 + 0 + 9 + 1 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44515584 + 2576025 = 6672^2 + 1605^2 .

It is not a de Polignac number, because 47091609 - 2¹ = 47091607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47091601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2616192 + ... + 2616209.

It is an arithmetic number, because the mean of its divisors is an integer number (11336871).

Almost surely, 2^47091609 is an apocalyptic number.

It is an amenable number.

47091609 is a deficient number, since it is larger than the sum of its proper divisors (20929617).

47091609 is a wasteful number, since it uses less digits than its factorization.

47091609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5232407 (or 5232404 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 47091609 is about 6862.3326209096. The cubic root of 47091609 is about 361.1169245998.

The spelling of 47091609 in words is "forty-seven million, ninety-one thousand, six hundred nine".