7728246973 has 2 divisors, whose sum is σ = 7728246974. Its totient is φ = 7728246972.

The previous prime is 7728246931. The next prime is 7728246991. The reversal of 7728246973 is 3796428277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5364537049 + 2363709924 = 73243^2 + 48618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7728246973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7728246173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3864123486 + 3864123487.

It is an arithmetic number, because the mean of its divisors is an integer number (3864123487).

Almost surely, 2^7728246973 is an apocalyptic number.

It is an amenable number.

7728246973 is a deficient number, since it is larger than the sum of its proper divisors (1).

7728246973 is an equidigital number, since it uses as much as digits as its factorization.

7728246973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 55.

The square root of 7728246973 is about 87910.4485996972. The cubic root of 7728246973 is about 1977.0925402888.

The spelling of 7728246973 in words is "seven billion, seven hundred twenty-eight million, two hundred forty-six thousand, nine hundred seventy-three".