47477 has 4 divisors (see below), whose sum is σ = 47916. Its totient is φ = 47040.

The previous prime is 47459. The next prime is 47491. The reversal of 47477 is 77474.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 77474 = 2 ⋅38737.

It can be written as a sum of positive squares in 2 ways, for example, as 42436 + 5041 = 206^2 + 71^2 .

It is a cyclic number.

It is not a de Polignac number, because 47477 - 2⁸ = 47221 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 47477.

It is not an unprimeable number, because it can be changed into a prime (47407) 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, 77 + ... + 317.

It is an arithmetic number, because the mean of its divisors is an integer number (11979).

2⁴⁷⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

47477 is a deficient number, since it is larger than the sum of its proper divisors (439).

47477 is a wasteful number, since it uses less digits than its factorization.

47477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438.

The product of its digits is 5488, while the sum is 29.

The square root of 47477 is about 217.8921751693. The cubic root of 47477 is about 36.2099359192.

The spelling of 47477 in words is "forty-seven thousand, four hundred seventy-seven", and thus it is an iban number.