7780242089 has 2 divisors, whose sum is σ = 7780242090. Its totient is φ = 7780242088.

The previous prime is 7780242079. The next prime is 7780242157. The reversal of 7780242089 is 9802420877.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7767425689 + 12816400 = 88133^2 + 3580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7780242089 is a prime.

It is not a weakly prime, because it can be changed into another prime (7780242059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3890121044 + 3890121045.

It is an arithmetic number, because the mean of its divisors is an integer number (3890121045).

Almost surely, 2^7780242089 is an apocalyptic number.

It is an amenable number.

7780242089 is a deficient number, since it is larger than the sum of its proper divisors (1).

7780242089 is an equidigital number, since it uses as much as digits as its factorization.

7780242089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 7780242089 is about 88205.6805937123. The cubic root of 7780242089 is about 1981.5165479713.

The spelling of 7780242089 in words is "seven billion, seven hundred eighty million, two hundred forty-two thousand, eighty-nine".