30799983661 has 2 divisors, whose sum is σ = 30799983662. Its totient is φ = 30799983660.

The previous prime is 30799983659. The next prime is 30799983671. The reversal of 30799983661 is 16638999703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30486906025 + 313077636 = 174605^2 + 17694^2 .

It is an emirp because it is prime and its reverse (16638999703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30799983661 - 2¹ = 30799983659 is a prime.

Together with 30799983659, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 30799983661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30799983671) 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, 15399991830 + 15399991831.

It is an arithmetic number, because the mean of its divisors is an integer number (15399991831).

Almost surely, 2^30799983661 is an apocalyptic number.

It is an amenable number.

30799983661 is a deficient number, since it is larger than the sum of its proper divisors (1).

30799983661 is an equidigital number, since it uses as much as digits as its factorization.

30799983661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13226976, while the sum is 61.

The spelling of 30799983661 in words is "thirty billion, seven hundred ninety-nine million, nine hundred eighty-three thousand, six hundred sixty-one".