7789781141 has 2 divisors, whose sum is σ = 7789781142. Its totient is φ = 7789781140.

The previous prime is 7789781119. The next prime is 7789781203. The reversal of 7789781141 is 1411879877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6942389041 + 847392100 = 83321^2 + 29110^2 .

It is a cyclic number.

It is not a de Polignac number, because 7789781141 - 2¹⁴ = 7789764757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7789781641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3894890570 + 3894890571.

It is an arithmetic number, because the mean of its divisors is an integer number (3894890571).

Almost surely, 2^7789781141 is an apocalyptic number.

It is an amenable number.

7789781141 is a deficient number, since it is larger than the sum of its proper divisors (1).

7789781141 is an equidigital number, since it uses as much as digits as its factorization.

7789781141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 53.

The square root of 7789781141 is about 88259.7368056352. The cubic root of 7789781141 is about 1982.3260373384.

The spelling of 7789781141 in words is "seven billion, seven hundred eighty-nine million, seven hundred eighty-one thousand, one hundred forty-one".