1990759 has 2 divisors, whose sum is σ = 1990760. Its totient is φ = 1990758.

The previous prime is 1990753. The next prime is 1990787. The reversal of 1990759 is 9570991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1990759 - 2¹³ = 1982567 is a prime.

It is a Chen prime.

1990759 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995379 + 995380.

It is an arithmetic number, because the mean of its divisors is an integer number (995380).

2^1990759 is an apocalyptic number.

1990759 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990759 is an equidigital number, since it uses as much as digits as its factorization.

1990759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25515, while the sum is 40.

The square root of 1990759 is about 1410.9425927372. The cubic root of 1990759 is about 125.7977565120.

The spelling of 1990759 in words is "one million, nine hundred ninety thousand, seven hundred fifty-nine".