123030191 has 2 divisors, whose sum is σ = 123030192. Its totient is φ = 123030190.

The previous prime is 123030179. The next prime is 123030203. The reversal of 123030191 is 191030321.

It is a balanced prime because it is at equal distance from previous prime (123030179) and next prime (123030203).

It is a cyclic number.

It is not a de Polignac number, because 123030191 - 2¹⁸ = 122768047 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123038191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61515095 + 61515096.

It is an arithmetic number, because the mean of its divisors is an integer number (61515096).

Almost surely, 2^123030191 is an apocalyptic number.

123030191 is a deficient number, since it is larger than the sum of its proper divisors (1).

123030191 is an equidigital number, since it uses as much as digits as its factorization.

123030191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 123030191 is about 11091.8975382934. The cubic root of 123030191 is about 497.3596698557.

The spelling of 123030191 in words is "one hundred twenty-three million, thirty thousand, one hundred ninety-one".