64999 has 8 divisors (see below), whose sum is σ = 74880. Its totient is φ = 55800.

The previous prime is 64997. The next prime is 65003. The reversal of 64999 is 99946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64999 - 2¹ = 64997 is a prime.

It is a Duffinian number.

64999 is a modest number, since divided by 999 gives 64 as remainder.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54 + ... + 364.

It is an arithmetic number, because the mean of its divisors is an integer number (9360).

2⁶⁴⁹⁹⁹ is an apocalyptic number.

64999 is a deficient number, since it is larger than the sum of its proper divisors (9881).

64999 is a wasteful number, since it uses less digits than its factorization.

64999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341.

The product of its digits is 17496, while the sum is 37.

The square root of 64999 is about 254.9490145107. The cubic root of 64999 is about 40.2070513938.

It can be divided in two parts, 64 and 999, that multiplied together give a palindrome (63936).

The spelling of 64999 in words is "sixty-four thousand, nine hundred ninety-nine".