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64087 = 193373
BaseRepresentation
bin1111101001010111
310020220121
433221113
54022322
61212411
7354562
oct175127
9106817
1064087
1144171
1231107
132322a
14194d9
1513ec7
hexfa57

64087 has 4 divisors (see below), whose sum is σ = 67480. Its totient is φ = 60696.

The previous prime is 64081. The next prime is 64091. The reversal of 64087 is 78046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78046 = 239023.

It is a cyclic number.

It is not a de Polignac number, because 64087 - 211 = 62039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1668 + ... + 1705.

It is an arithmetic number, because the mean of its divisors is an integer number (16870).

264087 is an apocalyptic number.

64087 is a deficient number, since it is larger than the sum of its proper divisors (3393).

64087 is a wasteful number, since it uses less digits than its factorization.

64087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3392.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 64087 is about 253.1541032652. The cubic root of 64087 is about 40.0181167933.

It can be divided in two parts, 640 and 87, that added together give a palindrome (727).

The spelling of 64087 in words is "sixty-four thousand, eighty-seven".

Divisors: 1 19 3373 64087