64787 has 8 divisors (see below), whose sum is σ = 71136. Its totient is φ = 58752.

The previous prime is 64783. The next prime is 64793. The reversal of 64787 is 78746.

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

It is not a de Polignac number, because 64787 - 2² = 64783 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64787.

It is not an unprimeable number, because it can be changed into a prime (64781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578 + ... + 680.

It is an arithmetic number, because the mean of its divisors is an integer number (8892).

2⁶⁴⁷⁸⁷ is an apocalyptic number.

64787 is a deficient number, since it is larger than the sum of its proper divisors (6349).

64787 is a wasteful number, since it uses less digits than its factorization.

64787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157.

The product of its digits is 9408, while the sum is 32.

The square root of 64787 is about 254.5329055348. The cubic root of 64787 is about 40.1632908289.

The spelling of 64787 in words is "sixty-four thousand, seven hundred eighty-seven".