1323203191 has 2 divisors, whose sum is σ = 1323203192. Its totient is φ = 1323203190.

The previous prime is 1323203113. The next prime is 1323203197. The reversal of 1323203191 is 1913023231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1323203191 - 2²³ = 1314814583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323203197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661601595 + 661601596.

It is an arithmetic number, because the mean of its divisors is an integer number (661601596).

Almost surely, 2^1323203191 is an apocalyptic number.

1323203191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323203191 is an equidigital number, since it uses as much as digits as its factorization.

1323203191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1323203191 is about 36375.8600035793. The cubic root of 1323203191 is about 1097.8479110360.

The spelling of 1323203191 in words is "one billion, three hundred twenty-three million, two hundred three thousand, one hundred ninety-one".