4639849 has 2 divisors, whose sum is σ = 4639850. Its totient is φ = 4639848.

The previous prime is 4639823. The next prime is 4639853. The reversal of 4639849 is 9489364.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3829849 + 810000 = 1957^2 + 900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4639849 is a prime.

4639849 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4639879) 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 as a sum of consecutive naturals, namely, 2319924 + 2319925.

It is an arithmetic number, because the mean of its divisors is an integer number (2319925).

Almost surely, 2^4639849 is an apocalyptic number.

It is an amenable number.

4639849 is a deficient number, since it is larger than the sum of its proper divisors (1).

4639849 is an equidigital number, since it uses as much as digits as its factorization.

4639849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 4639849 is about 2154.0308725736. The cubic root of 4639849 is about 166.7892089893.

The spelling of 4639849 in words is "four million, six hundred thirty-nine thousand, eight hundred forty-nine".