647351 has 4 divisors (see below), whose sum is σ = 653400. Its totient is φ = 641304.

The previous prime is 647341. The next prime is 647357. The reversal of 647351 is 153746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153746 = 2 ⋅76873.

It is a cyclic number.

It is not a de Polignac number, because 647351 - 2¹⁴ = 630967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 647351.

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 647351.

It is not an unprimeable number, because it can be changed into a prime (647357) 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 3 ways as a sum of consecutive naturals, for example, 2861 + ... + 3078.

It is an arithmetic number, because the mean of its divisors is an integer number (163350).

2⁶⁴⁷³⁵¹ is an apocalyptic number.

647351 is a deficient number, since it is larger than the sum of its proper divisors (6049).

647351 is a wasteful number, since it uses less digits than its factorization.

647351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6048.

The product of its digits is 2520, while the sum is 26.

The square root of 647351 is about 804.5812575495. The cubic root of 647351 is about 86.5060750631.

The spelling of 647351 in words is "six hundred forty-seven thousand, three hundred fifty-one".