8780020369 has 2 divisors, whose sum is σ = 8780020370. Its totient is φ = 8780020368.

The previous prime is 8780020303. The next prime is 8780020397. The reversal of 8780020369 is 9630200878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8444691025 + 335329344 = 91895^2 + 18312^2 .

It is a cyclic number.

It is not a de Polignac number, because 8780020369 - 2⁷ = 8780020241 is a prime.

It is a super-2 number, since 2×8780020369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8780020169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4390010184 + 4390010185.

It is an arithmetic number, because the mean of its divisors is an integer number (4390010185).

Almost surely, 2^8780020369 is an apocalyptic number.

It is an amenable number.

8780020369 is a deficient number, since it is larger than the sum of its proper divisors (1).

8780020369 is an equidigital number, since it uses as much as digits as its factorization.

8780020369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 8780020369 is about 93701.7628916340. The cubic root of 8780020369 is about 2062.9965790734.

The spelling of 8780020369 in words is "eight billion, seven hundred eighty million, twenty thousand, three hundred sixty-nine".