47786161 has 4 divisors (see below), whose sum is σ = 47812132. Its totient is φ = 47760192.

The previous prime is 47786153. The next prime is 47786173. The reversal of 47786161 is 16168774.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28037025 + 19749136 = 5295^2 + 4444^2 .

It is a cyclic number.

It is not a de Polignac number, because 47786161 - 2³ = 47786153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47786191) 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, 9996 + ... + 13981.

It is an arithmetic number, because the mean of its divisors is an integer number (11953033).

Almost surely, 2^47786161 is an apocalyptic number.

It is an amenable number.

47786161 is a deficient number, since it is larger than the sum of its proper divisors (25971).

47786161 is a wasteful number, since it uses less digits than its factorization.

47786161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25970.

The product of its digits is 56448, while the sum is 40.

The square root of 47786161 is about 6912.7535034890. The cubic root of 47786161 is about 362.8836328603.

The spelling of 47786161 in words is "forty-seven million, seven hundred eighty-six thousand, one hundred sixty-one".