30861111389 has 2 divisors, whose sum is σ = 30861111390. Its totient is φ = 30861111388.

The previous prime is 30861111343. The next prime is 30861111431. The reversal of 30861111389 is 98311116803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30335188900 + 525922489 = 174170^2 + 22933^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30861111389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30861111319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15430555694 + 15430555695.

It is an arithmetic number, because the mean of its divisors is an integer number (15430555695).

Almost surely, 2^30861111389 is an apocalyptic number.

It is an amenable number.

30861111389 is a deficient number, since it is larger than the sum of its proper divisors (1).

30861111389 is an equidigital number, since it uses as much as digits as its factorization.

30861111389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 30861111389 in words is "thirty billion, eight hundred sixty-one million, one hundred eleven thousand, three hundred eighty-nine".