1013123191 has 2 divisors, whose sum is σ = 1013123192. Its totient is φ = 1013123190.

The previous prime is 1013123171. The next prime is 1013123203. The reversal of 1013123191 is 1913213101.

1013123191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1913213101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1013123191 is a prime.

It is a super-3 number, since 3×1013123191³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1013123101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506561595 + 506561596.

It is an arithmetic number, because the mean of its divisors is an integer number (506561596).

Almost surely, 2^1013123191 is an apocalyptic number.

1013123191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013123191 is an equidigital number, since it uses as much as digits as its factorization.

1013123191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1013123191 is about 31829.5961488675. The cubic root of 1013123191 is about 1004.3553999513.

Adding to 1013123191 its reverse (1913213101), we get a palindrome (2926336292).

The spelling of 1013123191 in words is "one billion, thirteen million, one hundred twenty-three thousand, one hundred ninety-one".