7945447049 has 2 divisors, whose sum is σ = 7945447050. Its totient is φ = 7945447048.

The previous prime is 7945446997. The next prime is 7945447099. The reversal of 7945447049 is 9407445497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7927231225 + 18215824 = 89035^2 + 4268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7945447049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7945447099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3972723524 + 3972723525.

It is an arithmetic number, because the mean of its divisors is an integer number (3972723525).

Almost surely, 2^7945447049 is an apocalyptic number.

It is an amenable number.

7945447049 is a deficient number, since it is larger than the sum of its proper divisors (1).

7945447049 is an equidigital number, since it uses as much as digits as its factorization.

7945447049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The square root of 7945447049 is about 89137.2371627032. The cubic root of 7945447049 is about 1995.4435480058.

The spelling of 7945447049 in words is "seven billion, nine hundred forty-five million, four hundred forty-seven thousand, forty-nine".