1990181119 has 2 divisors, whose sum is σ = 1990181120. Its totient is φ = 1990181118.

The previous prime is 1990181077. The next prime is 1990181131. The reversal of 1990181119 is 9111810991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1990181119 - 2⁷ = 1990180991 is a prime.

It is a super-2 number, since 2×1990181119² = 7921641772848184322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990181159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995090559 + 995090560.

It is an arithmetic number, because the mean of its divisors is an integer number (995090560).

Almost surely, 2^1990181119 is an apocalyptic number.

1990181119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990181119 is an equidigital number, since it uses as much as digits as its factorization.

1990181119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 40.

The square root of 1990181119 is about 44611.4460536755. The cubic root of 1990181119 is about 1257.8558306986.

The spelling of 1990181119 in words is "one billion, nine hundred ninety million, one hundred eighty-one thousand, one hundred nineteen".