647375 has 8 divisors (see below), whose sum is σ = 808080. Its totient is φ = 517800.

The previous prime is 647371. The next prime is 647399. The reversal of 647375 is 573746.

It is not a de Polignac number, because 647375 - 2² = 647371 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647375.

It is not an unprimeable number, because it can be changed into a prime (647371) 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 7 ways as a sum of consecutive naturals, for example, 2465 + ... + 2714.

It is an arithmetic number, because the mean of its divisors is an integer number (101010).

2⁶⁴⁷³⁷⁵ is an apocalyptic number.

647375 is a deficient number, since it is larger than the sum of its proper divisors (160705).

647375 is an equidigital number, since it uses as much as digits as its factorization.

647375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5194 (or 5184 counting only the distinct ones).

The product of its digits is 17640, while the sum is 32.

The square root of 647375 is about 804.5961720018. The cubic root of 647375 is about 86.5071440968.

The spelling of 647375 in words is "six hundred forty-seven thousand, three hundred seventy-five".