1990850413 has 2 divisors, whose sum is σ = 1990850414. Its totient is φ = 1990850412.

The previous prime is 1990850401. The next prime is 1990850441. The reversal of 1990850413 is 3140580991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1247361124 + 743489289 = 35318^2 + 27267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1990850413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990850443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995425206 + 995425207.

It is an arithmetic number, because the mean of its divisors is an integer number (995425207).

Almost surely, 2^1990850413 is an apocalyptic number.

It is an amenable number.

1990850413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990850413 is an equidigital number, since it uses as much as digits as its factorization.

1990850413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1990850413 is about 44618.9467939350. The cubic root of 1990850413 is about 1257.9968197098.

The spelling of 1990850413 in words is "one billion, nine hundred ninety million, eight hundred fifty thousand, four hundred thirteen".