4099968949 has 2 divisors, whose sum is σ = 4099968950. Its totient is φ = 4099968948.

The previous prime is 4099968947. The next prime is 4099968967. The reversal of 4099968949 is 9498699904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3900876849 + 199092100 = 62457^2 + 14110^2 .

It is a cyclic number.

It is not a de Polignac number, because 4099968949 - 2¹ = 4099968947 is a prime.

Together with 4099968947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4099968947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2049984474 + 2049984475.

It is an arithmetic number, because the mean of its divisors is an integer number (2049984475).

Almost surely, 2^4099968949 is an apocalyptic number.

It is an amenable number.

4099968949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4099968949 is an equidigital number, since it uses as much as digits as its factorization.

4099968949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45349632, while the sum is 67.

The square root of 4099968949 is about 64030.9999062954. Note that the first 4 decimals coincide. The cubic root of 4099968949 is about 1600.5166234041.

The spelling of 4099968949 in words is "four billion, ninety-nine million, nine hundred sixty-eight thousand, nine hundred forty-nine".