7509949 has 2 divisors, whose sum is σ = 7509950. Its totient is φ = 7509948.

The previous prime is 7509919. The next prime is 7510033. The reversal of 7509949 is 9499057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5673924 + 1836025 = 2382^2 + 1355^2 .

It is an emirp because it is prime and its reverse (9499057) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7509949 - 2⁵ = 7509917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7509919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3754974 + 3754975.

It is an arithmetic number, because the mean of its divisors is an integer number (3754975).

Almost surely, 2^7509949 is an apocalyptic number.

It is an amenable number.

7509949 is a deficient number, since it is larger than the sum of its proper divisors (1).

7509949 is an equidigital number, since it uses as much as digits as its factorization.

7509949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 7509949 is about 2740.4286161110. The cubic root of 7509949 is about 195.8298971883.

The spelling of 7509949 in words is "seven million, five hundred nine thousand, nine hundred forty-nine".