30191779049 has 2 divisors, whose sum is σ = 30191779050. Its totient is φ = 30191779048.

The previous prime is 30191779039. The next prime is 30191779069. The reversal of 30191779049 is 94097719103.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27107976025 + 3083803024 = 164645^2 + 55532^2 .

It is an emirp because it is prime and its reverse (94097719103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30191779049 - 2³² = 25896811753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30191778988 and 30191779006.

It is not a weakly prime, because it can be changed into another prime (30191779039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15095889524 + 15095889525.

It is an arithmetic number, because the mean of its divisors is an integer number (15095889525).

Almost surely, 2^30191779049 is an apocalyptic number.

It is an amenable number.

30191779049 is a deficient number, since it is larger than the sum of its proper divisors (1).

30191779049 is an equidigital number, since it uses as much as digits as its factorization.

30191779049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428652, while the sum is 50.

The spelling of 30191779049 in words is "thirty billion, one hundred ninety-one million, seven hundred seventy-nine thousand, forty-nine".