30999858697 has 2 divisors, whose sum is σ = 30999858698. Its totient is φ = 30999858696.

The previous prime is 30999858613. The next prime is 30999858719. The reversal of 30999858697 is 79685899903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25537318416 + 5462540281 = 159804^2 + 73909^2 .

It is an emirp because it is prime and its reverse (79685899903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30999858697 - 2¹¹ = 30999856649 is a prime.

It is not a weakly prime, because it can be changed into another prime (30999858497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15499929348 + 15499929349.

It is an arithmetic number, because the mean of its divisors is an integer number (15499929349).

Almost surely, 2^30999858697 is an apocalyptic number.

It is an amenable number.

30999858697 is a deficient number, since it is larger than the sum of its proper divisors (1).

30999858697 is an equidigital number, since it uses as much as digits as its factorization.

30999858697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264539520, while the sum is 73.

The spelling of 30999858697 in words is "thirty billion, nine hundred ninety-nine million, eight hundred fifty-eight thousand, six hundred ninety-seven".