647467 has 4 divisors (see below), whose sum is σ = 649096. Its totient is φ = 645840.

The previous prime is 647453. The next prime is 647477. The reversal of 647467 is 764746.

647467 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 764746 = 2 ⋅382373.

It is a cyclic number.

It is not a de Polignac number, because 647467 - 2¹¹ = 645419 is a prime.

It is an Ulam number.

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 647467.

It is not an unprimeable number, because it can be changed into a prime (647417) 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, 223 + ... + 1159.

It is an arithmetic number, because the mean of its divisors is an integer number (162274).

2⁶⁴⁷⁴⁶⁷ is an apocalyptic number.

647467 is a deficient number, since it is larger than the sum of its proper divisors (1629).

647467 is an equidigital number, since it uses as much as digits as its factorization.

647467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628.

The product of its digits is 28224, while the sum is 34.

The square root of 647467 is about 804.6533415080. The cubic root of 647467 is about 86.5112418147.

The spelling of 647467 in words is "six hundred forty-seven thousand, four hundred sixty-seven".