47161291 has 4 divisors (see below), whose sum is σ = 47505672. Its totient is φ = 46816912.

The previous prime is 47161277. The next prime is 47161307. The reversal of 47161291 is 19216174.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19216174 = 2 ⋅9608087.

It is a cyclic number.

It is not a de Polignac number, because 47161291 - 2²¹ = 45064139 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47161241) 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, 171985 + ... + 172258.

It is an arithmetic number, because the mean of its divisors is an integer number (11876418).

Almost surely, 2^47161291 is an apocalyptic number.

47161291 is a deficient number, since it is larger than the sum of its proper divisors (344381).

47161291 is a wasteful number, since it uses less digits than its factorization.

47161291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344380.

The product of its digits is 3024, while the sum is 31.

The square root of 47161291 is about 6867.4078807072. The cubic root of 47161291 is about 361.2949531189.

The spelling of 47161291 in words is "forty-seven million, one hundred sixty-one thousand, two hundred ninety-one".