47161409 has 4 divisors (see below), whose sum is σ = 47175216. Its totient is φ = 47147604.

The previous prime is 47161403. The next prime is 47161459. The reversal of 47161409 is 90416174.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 47161409 - 2⁴ = 47161393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47161403) 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 3 ways as a sum of consecutive naturals, for example, 2402 + ... + 10004.

It is an arithmetic number, because the mean of its divisors is an integer number (11793804).

Almost surely, 2^47161409 is an apocalyptic number.

It is an amenable number.

47161409 is a deficient number, since it is larger than the sum of its proper divisors (13807).

47161409 is an equidigital number, since it uses as much as digits as its factorization.

47161409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13806.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 47161409 is about 6867.4164720075. The cubic root of 47161409 is about 361.2952544449.

The spelling of 47161409 in words is "forty-seven million, one hundred sixty-one thousand, four hundred nine".