647441 has 2 divisors, whose sum is σ = 647442. Its totient is φ = 647440.

The previous prime is 647429. The next prime is 647453. The reversal of 647441 is 144746.

It is a balanced prime because it is at equal distance from previous prime (647429) and next prime (647453).

It can be written as a sum of positive squares in only one way, i.e., 555025 + 92416 = 745^2 + 304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647441 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 647441.

It is not a weakly prime, because it can be changed into another prime (647401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323720 + 323721.

It is an arithmetic number, because the mean of its divisors is an integer number (323721).

2⁶⁴⁷⁴⁴¹ is an apocalyptic number.

It is an amenable number.

647441 is a deficient number, since it is larger than the sum of its proper divisors (1).

647441 is an equidigital number, since it uses as much as digits as its factorization.

647441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 26.

The square root of 647441 is about 804.6371853202. The cubic root of 647441 is about 86.5100838033.

The spelling of 647441 in words is "six hundred forty-seven thousand, four hundred forty-one".