190221949 has 2 divisors, whose sum is σ = 190221950. Its totient is φ = 190221948.

The previous prime is 190221931. The next prime is 190221961. The reversal of 190221949 is 949122091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140067225 + 50154724 = 11835^2 + 7082^2 .

It is a cyclic number.

It is not a de Polignac number, because 190221949 - 2²³ = 181833341 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 (190221979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95110974 + 95110975.

It is an arithmetic number, because the mean of its divisors is an integer number (95110975).

Almost surely, 2^190221949 is an apocalyptic number.

It is an amenable number.

190221949 is a deficient number, since it is larger than the sum of its proper divisors (1).

190221949 is an equidigital number, since it uses as much as digits as its factorization.

190221949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 190221949 is about 13792.0973386936. The cubic root of 190221949 is about 575.1134737612.

The spelling of 190221949 in words is "one hundred ninety million, two hundred twenty-one thousand, nine hundred forty-nine".