9904949 has 2 divisors, whose sum is σ = 9904950. Its totient is φ = 9904948.

The previous prime is 9904919. The next prime is 9904967. The reversal of 9904949 is 9494099.

It is a happy number.

9904949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 13924 = 3145^2 + 118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9904949 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9904919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4952474 + 4952475.

It is an arithmetic number, because the mean of its divisors is an integer number (4952475).

Almost surely, 2^9904949 is an apocalyptic number.

It is an amenable number.

9904949 is a deficient number, since it is larger than the sum of its proper divisors (1).

9904949 is an equidigital number, since it uses as much as digits as its factorization.

9904949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 9904949 is about 3147.2128939746. The cubic root of 9904949 is about 214.7586908645.

The spelling of 9904949 in words is "nine million, nine hundred four thousand, nine hundred forty-nine".