30068477891 has 2 divisors, whose sum is σ = 30068477892. Its totient is φ = 30068477890.

The previous prime is 30068477867. The next prime is 30068477893. The reversal of 30068477891 is 19877486003.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30068477891 is a prime.

It is a super-2 number, since 2×30068477891² (a number of 22 digits) contains 22 as substring.

Together with 30068477893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30068477893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15034238945 + 15034238946.

It is an arithmetic number, because the mean of its divisors is an integer number (15034238946).

Almost surely, 2^30068477891 is an apocalyptic number.

30068477891 is a deficient number, since it is larger than the sum of its proper divisors (1).

30068477891 is an equidigital number, since it uses as much as digits as its factorization.

30068477891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 30068477891 in words is "thirty billion, sixty-eight million, four hundred seventy-seven thousand, eight hundred ninety-one".