7742672209 has 2 divisors, whose sum is σ = 7742672210. Its totient is φ = 7742672208.

The previous prime is 7742672177. The next prime is 7742672279. The reversal of 7742672209 is 9022762477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5172486400 + 2570185809 = 71920^2 + 50697^2 .

It is a cyclic number.

It is not a de Polignac number, because 7742672209 - 2⁵ = 7742672177 is a prime.

It is not a weakly prime, because it can be changed into another prime (7742672279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3871336104 + 3871336105.

It is an arithmetic number, because the mean of its divisors is an integer number (3871336105).

Almost surely, 2^7742672209 is an apocalyptic number.

It is an amenable number.

7742672209 is a deficient number, since it is larger than the sum of its proper divisors (1).

7742672209 is an equidigital number, since it uses as much as digits as its factorization.

7742672209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 592704, while the sum is 46.

The square root of 7742672209 is about 87992.4554095407. The cubic root of 7742672209 is about 1978.3218962772.

The spelling of 7742672209 in words is "seven billion, seven hundred forty-two million, six hundred seventy-two thousand, two hundred nine".