4009849 has 2 divisors, whose sum is σ = 4009850. Its totient is φ = 4009848.

The previous prime is 4009823. The next prime is 4009861. The reversal of 4009849 is 9489004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2999824 + 1010025 = 1732^2 + 1005^2 .

It is a cyclic number.

It is not a de Polignac number, because 4009849 - 2⁷ = 4009721 is a prime.

It is not a weakly prime, because it can be changed into another prime (4009249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2004924 + 2004925.

It is an arithmetic number, because the mean of its divisors is an integer number (2004925).

Almost surely, 2^4009849 is an apocalyptic number.

It is an amenable number.

4009849 is a deficient number, since it is larger than the sum of its proper divisors (1).

4009849 is an equidigital number, since it uses as much as digits as its factorization.

4009849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 4009849 is about 2002.4607361943. The cubic root of 4009849 is about 158.8702843520.

The spelling of 4009849 in words is "four million, nine thousand, eight hundred forty-nine".