123038191 has 2 divisors, whose sum is σ = 123038192. Its totient is φ = 123038190.

The previous prime is 123038177. The next prime is 123038203. The reversal of 123038191 is 191830321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123038191 - 2¹³ = 123029999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123038291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61519095 + 61519096.

It is an arithmetic number, because the mean of its divisors is an integer number (61519096).

Almost surely, 2^123038191 is an apocalyptic number.

123038191 is a deficient number, since it is larger than the sum of its proper divisors (1).

123038191 is an equidigital number, since it uses as much as digits as its factorization.

123038191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 123038191 is about 11092.2581560294. The cubic root of 123038191 is about 497.3704498414.

The spelling of 123038191 in words is "one hundred twenty-three million, thirty-eight thousand, one hundred ninety-one".