647413 has 4 divisors (see below), whose sum is σ = 697228. Its totient is φ = 597600.

The previous prime is 647401. The next prime is 647417. The reversal of 647413 is 314746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161604 + 485809 = 402^2 + 697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647417) 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, 24888 + ... + 24913.

It is an arithmetic number, because the mean of its divisors is an integer number (174307).

2⁶⁴⁷⁴¹³ is an apocalyptic number.

It is an amenable number.

647413 is a deficient number, since it is larger than the sum of its proper divisors (49815).

647413 is a wasteful number, since it uses less digits than its factorization.

647413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49814.

The product of its digits is 2016, while the sum is 25.

The square root of 647413 is about 804.6197859859. The cubic root of 647413 is about 86.5088366795.

The spelling of 647413 in words is "six hundred forty-seven thousand, four hundred thirteen".