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64387 = 31267
BaseRepresentation
bin1111101110000011
310021022201
433232003
54030022
61214031
7355501
oct175603
9107281
1064387
1144414
1231317
13233cb
1419671
1514127
hexfb83

64387 has 6 divisors (see below), whose sum is σ = 67524. Its totient is φ = 61380.

The previous prime is 64381. The next prime is 64399. The reversal of 64387 is 78346.

It is a de Polignac number, because none of the positive numbers 2k-64387 is a prime.

It is a Duffinian number.

64387 is a lucky number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (64381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 928 + ... + 994.

It is an arithmetic number, because the mean of its divisors is an integer number (11254).

264387 is an apocalyptic number.

64387 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

64387 is the 147-th hex number.

64387 is a deficient number, since it is larger than the sum of its proper divisors (3137).

64387 is an equidigital number, since it uses as much as digits as its factorization.

64387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 98 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 64387 is about 253.7459359280. The cubic root of 64387 is about 40.0804630340.

The spelling of 64387 in words is "sixty-four thousand, three hundred eighty-seven".

Divisors: 1 31 67 961 2077 64387