7728754049 has 2 divisors, whose sum is σ = 7728754050. Its totient is φ = 7728754048.

The previous prime is 7728754021. The next prime is 7728754073. The reversal of 7728754049 is 9404578277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6844583824 + 884170225 = 82732^2 + 29735^2 .

It is an emirp because it is prime and its reverse (9404578277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7728754049 - 2²⁰ = 7727705473 is a prime.

It is not a weakly prime, because it can be changed into another prime (7727754049) 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, 3864377024 + 3864377025.

It is an arithmetic number, because the mean of its divisors is an integer number (3864377025).

Almost surely, 2^7728754049 is an apocalyptic number.

It is an amenable number.

7728754049 is a deficient number, since it is larger than the sum of its proper divisors (1).

7728754049 is an equidigital number, since it uses as much as digits as its factorization.

7728754049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The square root of 7728754049 is about 87913.3326009201. The cubic root of 7728754049 is about 1977.1357805500.

The spelling of 7728754049 in words is "seven billion, seven hundred twenty-eight million, seven hundred fifty-four thousand, forty-nine".