1990181113 has 8 divisors (see below), whose sum is σ = 2033845632. Its totient is φ = 1946571696.

The previous prime is 1990181077. The next prime is 1990181119. The reversal of 1990181113 is 3111810991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1990181113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990181119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64006 + ... + 89872.

It is an arithmetic number, because the mean of its divisors is an integer number (254230704).

Almost surely, 2^1990181113 is an apocalyptic number.

It is an amenable number.

1990181113 is a deficient number, since it is larger than the sum of its proper divisors (43664519).

1990181113 is a wasteful number, since it uses less digits than its factorization.

1990181113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27551.

The product of its (nonzero) digits is 1944, while the sum is 34.

The square root of 1990181113 is about 44611.4459864282. The cubic root of 1990181113 is about 1257.8558294346.

The spelling of 1990181113 in words is "one billion, nine hundred ninety million, one hundred eighty-one thousand, one hundred thirteen".