64147 has 4 divisors (see below), whose sum is σ = 66960. Its totient is φ = 61336.

The previous prime is 64123. The next prime is 64151. The reversal of 64147 is 74146.

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 64147 - 2⁷ = 64019 is a prime.

It is a super-2 number, since 2×64147² = 8229675218, which contains 22 as substring.

It is a Duffinian number.

64147 is a lucky number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64147.

It is not an unprimeable number, because it can be changed into a prime (64157) 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, 1372 + ... + 1417.

It is an arithmetic number, because the mean of its divisors is an integer number (16740).

2⁶⁴¹⁴⁷ is an apocalyptic number.

64147 is a deficient number, since it is larger than the sum of its proper divisors (2813).

64147 is a wasteful number, since it uses less digits than its factorization.

64147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812.

The product of its digits is 672, while the sum is 22.

The square root of 64147 is about 253.2725804346. The cubic root of 64147 is about 40.0306015826.

Subtracting 64147 from its reverse (74146), we obtain a palindrome (9999).

The spelling of 64147 in words is "sixty-four thousand, one hundred forty-seven".