9779831401 has 2 divisors, whose sum is σ = 9779831402. Its totient is φ = 9779831400.

The previous prime is 9779831381. The next prime is 9779831419. The reversal of 9779831401 is 1041389779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5032483600 + 4747347801 = 70940^2 + 68901^2 .

It is a cyclic number.

It is not a de Polignac number, because 9779831401 - 2⁷ = 9779831273 is a prime.

It is not a weakly prime, because it can be changed into another prime (9779831441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4889915700 + 4889915701.

It is an arithmetic number, because the mean of its divisors is an integer number (4889915701).

Almost surely, 2^9779831401 is an apocalyptic number.

It is an amenable number.

9779831401 is a deficient number, since it is larger than the sum of its proper divisors (1).

9779831401 is an equidigital number, since it uses as much as digits as its factorization.

9779831401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 9779831401 is about 98893.0300931264. The cubic root of 9779831401 is about 2138.5059155854.

The spelling of 9779831401 in words is "nine billion, seven hundred seventy-nine million, eight hundred thirty-one thousand, four hundred one".