190775281 has 2 divisors, whose sum is σ = 190775282. Its totient is φ = 190775280.

The previous prime is 190775269. The next prime is 190775339. The reversal of 190775281 is 182577091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98327056 + 92448225 = 9916^2 + 9615^2 .

It is a cyclic number.

It is not a de Polignac number, because 190775281 - 2⁷ = 190775153 is a prime.

It is a super-2 number, since 2×190775281² = 72790415681257922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (190775201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95387640 + 95387641.

It is an arithmetic number, because the mean of its divisors is an integer number (95387641).

Almost surely, 2^190775281 is an apocalyptic number.

It is an amenable number.

190775281 is a deficient number, since it is larger than the sum of its proper divisors (1).

190775281 is an equidigital number, since it uses as much as digits as its factorization.

190775281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 190775281 is about 13812.1425202609. The cubic root of 190775281 is about 575.6705784582.

The spelling of 190775281 in words is "one hundred ninety million, seven hundred seventy-five thousand, two hundred eighty-one".