7684944409 has 2 divisors, whose sum is σ = 7684944410. Its totient is φ = 7684944408.

The previous prime is 7684944331. The next prime is 7684944419. The reversal of 7684944409 is 9044494867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6411525184 + 1273419225 = 80072^2 + 35685^2 .

It is a cyclic number.

It is not a de Polignac number, because 7684944409 - 2²¹ = 7682847257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7684944409.

It is not a weakly prime, because it can be changed into another prime (7684944419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3842472204 + 3842472205.

It is an arithmetic number, because the mean of its divisors is an integer number (3842472205).

Almost surely, 2^7684944409 is an apocalyptic number.

It is an amenable number.

7684944409 is a deficient number, since it is larger than the sum of its proper divisors (1).

7684944409 is an equidigital number, since it uses as much as digits as its factorization.

7684944409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The square root of 7684944409 is about 87663.8147070957. The cubic root of 7684944409 is about 1973.3929700642.

The spelling of 7684944409 in words is "seven billion, six hundred eighty-four million, nine hundred forty-four thousand, four hundred nine".