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2987 = 29103
BaseRepresentation
bin101110101011
311002122
4232223
543422
621455
711465
oct5653
94078
102987
112276
12188b
13148a
141135
15d42
hexbab

2987 has 4 divisors (see below), whose sum is σ = 3120. Its totient is φ = 2856.

The previous prime is 2971. The next prime is 2999. The reversal of 2987 is 7892.

It can be divided in two parts, 2 and 987, that added together give a palindrome (989).

2987 is nontrivially palindromic in base 16.

2987 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

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

It is a cyclic number.

It is not a de Polignac number, because 2987 - 24 = 2971 is a prime.

It is an Ulam number.

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

It is a Duffinian number.

2987 is an undulating number in base 16.

2987 is a modest number, since divided by 87 gives 29 as remainder.

It is a plaindrome in base 12, base 13 and base 14.

It is a nialpdrome in base 15.

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, 23 + ... + 80.

It is an arithmetic number, because the mean of its divisors is an integer number (780).

22987 is an apocalyptic number.

2987 is a deficient number, since it is larger than the sum of its proper divisors (133).

2987 is a wasteful number, since it uses less digits than its factorization.

2987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132.

The product of its digits is 1008, while the sum is 26.

The square root of 2987 is about 54.6534536878. The cubic root of 2987 is about 14.4016330452.

The spelling of 2987 in words is "two thousand, nine hundred eighty-seven".

Divisors: 1 29 103 2987