47161609 has 4 divisors (see below), whose sum is σ = 51449040. Its totient is φ = 42874180.

The previous prime is 47161589. The next prime is 47161637. The reversal of 47161609 is 90616174.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47161609 - 2⁷ = 47161481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47161649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2143699 + ... + 2143720.

It is an arithmetic number, because the mean of its divisors is an integer number (12862260).

Almost surely, 2^47161609 is an apocalyptic number.

It is an amenable number.

47161609 is a deficient number, since it is larger than the sum of its proper divisors (4287431).

47161609 is a wasteful number, since it uses less digits than its factorization.

47161609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287430.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 47161609 is about 6867.4310335088. The cubic root of 47161609 is about 361.2957651658.

The spelling of 47161609 in words is "forty-seven million, one hundred sixty-one thousand, six hundred nine".