190886321 has 2 divisors, whose sum is σ = 190886322. Its totient is φ = 190886320.

The previous prime is 190886309. The next prime is 190886341. The reversal of 190886321 is 123688091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95550625 + 95335696 = 9775^2 + 9764^2 .

It is an emirp because it is prime and its reverse (123688091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190886321 - 2¹⁰ = 190885297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (190886341) 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, 95443160 + 95443161.

It is an arithmetic number, because the mean of its divisors is an integer number (95443161).

Almost surely, 2^190886321 is an apocalyptic number.

It is an amenable number.

190886321 is a deficient number, since it is larger than the sum of its proper divisors (1).

190886321 is an equidigital number, since it uses as much as digits as its factorization.

190886321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 190886321 is about 13816.1615870690. The cubic root of 190886321 is about 575.7822457259.

The spelling of 190886321 in words is "one hundred ninety million, eight hundred eighty-six thousand, three hundred twenty-one".