7909949 has 2 divisors, whose sum is σ = 7909950. Its totient is φ = 7909948.

The previous prime is 7909943. The next prime is 7909987. The reversal of 7909949 is 9499097.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6666724 + 1243225 = 2582^2 + 1115^2 .

It is an emirp because it is prime and its reverse (9499097) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7909949 - 2⁴ = 7909933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7909943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3954974 + 3954975.

It is an arithmetic number, because the mean of its divisors is an integer number (3954975).

Almost surely, 2^7909949 is an apocalyptic number.

It is an amenable number.

7909949 is a deficient number, since it is larger than the sum of its proper divisors (1).

7909949 is an equidigital number, since it uses as much as digits as its factorization.

7909949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 7909949 is about 2812.4631553142. The cubic root of 7909949 is about 199.2467415703.

The spelling of 7909949 in words is "seven million, nine hundred nine thousand, nine hundred forty-nine".