9779385397 has 2 divisors, whose sum is σ = 9779385398. Its totient is φ = 9779385396.

The previous prime is 9779385389. The next prime is 9779385409. The reversal of 9779385397 is 7935839779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9758673796 + 20711601 = 98786^2 + 4551^2 .

It is a cyclic number.

It is not a de Polignac number, because 9779385397 - 2³ = 9779385389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9779385377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4889692698 + 4889692699.

It is an arithmetic number, because the mean of its divisors is an integer number (4889692699).

Almost surely, 2^9779385397 is an apocalyptic number.

It is an amenable number.

9779385397 is a deficient number, since it is larger than the sum of its proper divisors (1).

9779385397 is an equidigital number, since it uses as much as digits as its factorization.

9779385397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90016920, while the sum is 67.

The square root of 9779385397 is about 98890.7750854446. The cubic root of 9779385397 is about 2138.4734066169.

The spelling of 9779385397 in words is "nine billion, seven hundred seventy-nine million, three hundred eighty-five thousand, three hundred ninety-seven".