102320191 has 2 divisors, whose sum is σ = 102320192. Its totient is φ = 102320190.

The previous prime is 102320143. The next prime is 102320201. The reversal of 102320191 is 191023201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102320191 - 2¹³ = 102311999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102320131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51160095 + 51160096.

It is an arithmetic number, because the mean of its divisors is an integer number (51160096).

Almost surely, 2^102320191 is an apocalyptic number.

102320191 is a deficient number, since it is larger than the sum of its proper divisors (1).

102320191 is an equidigital number, since it uses as much as digits as its factorization.

102320191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 102320191 is about 10115.3443342281. The cubic root of 102320191 is about 467.7212633305.

Adding to 102320191 its reverse (191023201), we get a palindrome (293343392).

The spelling of 102320191 in words is "one hundred two million, three hundred twenty thousand, one hundred ninety-one".