7938049949 has 2 divisors, whose sum is σ = 7938049950. Its totient is φ = 7938049948.

The previous prime is 7938049927. The next prime is 7938049963. The reversal of 7938049949 is 9499408397.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4743765625 + 3194284324 = 68875^2 + 56518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7938049949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7938049891 and 7938049900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7938049909) 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, 3969024974 + 3969024975.

It is an arithmetic number, because the mean of its divisors is an integer number (3969024975).

Almost surely, 2^7938049949 is an apocalyptic number.

It is an amenable number.

7938049949 is a deficient number, since it is larger than the sum of its proper divisors (1).

7938049949 is an equidigital number, since it uses as much as digits as its factorization.

7938049949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17635968, while the sum is 62.

The square root of 7938049949 is about 89095.7347407832. The cubic root of 7938049949 is about 1994.8241123989.

The spelling of 7938049949 in words is "seven billion, nine hundred thirty-eight million, forty-nine thousand, nine hundred forty-nine".