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2947 = 7421
BaseRepresentation
bin101110000011
311001011
4232003
543242
621351
711410
oct5603
94034
102947
11223a
121857
131459
141107
15d17
hexb83

2947 has 4 divisors (see below), whose sum is σ = 3376. Its totient is φ = 2520.

The previous prime is 2939. The next prime is 2953. The reversal of 2947 is 7492.

It can be divided in two parts, 2 and 947, that added together give a palindrome (949).

2947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2947 - 23 = 2939 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a plaindrome in base 11 and base 13.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (2917) 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, 204 + ... + 217.

It is an arithmetic number, because the mean of its divisors is an integer number (844).

22947 is an apocalyptic number.

2947 is a deficient number, since it is larger than the sum of its proper divisors (429).

2947 is an equidigital number, since it uses as much as digits as its factorization.

2947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its digits is 504, while the sum is 22.

The square root of 2947 is about 54.2862781926. The cubic root of 2947 is about 14.3370581029.

The spelling of 2947 in words is "two thousand, nine hundred forty-seven".

Divisors: 1 7 421 2947