4203649 has 2 divisors, whose sum is σ = 4203650. Its totient is φ = 4203648.

The previous prime is 4203643. The next prime is 4203677. The reversal of 4203649 is 9463024.

It is an a-pointer prime, because the next prime (4203677) can be obtained adding 4203649 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3873024 + 330625 = 1968^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 4203649 - 2¹⁷ = 4072577 is a prime.

It is a Chen prime.

4203649 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4203643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2101824 + 2101825.

It is an arithmetic number, because the mean of its divisors is an integer number (2101825).

Almost surely, 2^4203649 is an apocalyptic number.

It is an amenable number.

4203649 is a deficient number, since it is larger than the sum of its proper divisors (1).

4203649 is an equidigital number, since it uses as much as digits as its factorization.

4203649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 4203649 is about 2050.2802247498. The cubic root of 4203649 is about 161.3895764829.

The spelling of 4203649 in words is "four million, two hundred three thousand, six hundred forty-nine".