30680991193 has 4 divisors (see below), whose sum is σ = 30684058020. Its totient is φ = 30677924368.

The previous prime is 30680991157. The next prime is 30680991199. The reversal of 30680991193 is 39119908603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39119908603 = 419 ⋅93364937.

It can be written as a sum of positive squares in 2 ways, for example, as 5115539529 + 25565451664 = 71523^2 + 159892^2 .

It is a cyclic number.

It is not a de Polignac number, because 30680991193 - 2¹⁷ = 30680860121 is a prime.

It is a super-3 number, since 3×30680991193³ (a number of 32 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30680991199) 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 in 3 ways as a sum of consecutive naturals, for example, 1518358 + ... + 1538431.

It is an arithmetic number, because the mean of its divisors is an integer number (7671014505).

Almost surely, 2^30680991193 is an apocalyptic number.

It is an amenable number.

30680991193 is a deficient number, since it is larger than the sum of its proper divisors (3066827).

30680991193 is a wasteful number, since it uses less digits than its factorization.

30680991193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066826.

The product of its (nonzero) digits is 314928, while the sum is 49.

The spelling of 30680991193 in words is "thirty billion, six hundred eighty million, nine hundred ninety-one thousand, one hundred ninety-three".