1990000241 has 2 divisors, whose sum is σ = 1990000242. Its totient is φ = 1990000240.

The previous prime is 1990000219. The next prime is 1990000253. The reversal of 1990000241 is 1420000991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1980606016 + 9394225 = 44504^2 + 3065^2 .

It is an emirp because it is prime and its reverse (1420000991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1990000241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1990000241.

It is not a weakly prime, because it can be changed into another prime (1990002241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995000120 + 995000121.

It is an arithmetic number, because the mean of its divisors is an integer number (995000121).

Almost surely, 2^1990000241 is an apocalyptic number.

It is an amenable number.

1990000241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990000241 is an equidigital number, since it uses as much as digits as its factorization.

1990000241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1990000241 is about 44609.4187476143. The cubic root of 1990000241 is about 1257.8177227198.

The spelling of 1990000241 in words is "one billion, nine hundred ninety million, two hundred forty-one", and thus it is an aban number.