9779385389 has 2 divisors, whose sum is σ = 9779385390. Its totient is φ = 9779385388.

The previous prime is 9779385383. The next prime is 9779385397. The reversal of 9779385389 is 9835839779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9590872489 + 188512900 = 97933^2 + 13730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9779385389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9779385383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4889692694 + 4889692695.

It is an arithmetic number, because the mean of its divisors is an integer number (4889692695).

Almost surely, 2^9779385389 is an apocalyptic number.

It is an amenable number.

9779385389 is a deficient number, since it is larger than the sum of its proper divisors (1).

9779385389 is an equidigital number, since it uses as much as digits as its factorization.

9779385389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102876480, while the sum is 68.

The square root of 9779385389 is about 98890.7750449960. The cubic root of 9779385389 is about 2138.4734060338.

The spelling of 9779385389 in words is "nine billion, seven hundred seventy-nine million, three hundred eighty-five thousand, three hundred eighty-nine".