1990463 has 2 divisors, whose sum is σ = 1990464. Its totient is φ = 1990462.

The previous prime is 1990453. The next prime is 1990481. The reversal of 1990463 is 3640991.

It is a weak prime.

It is an emirp because it is prime and its reverse (3640991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1990463 - 2⁴ = 1990447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995231 + 995232.

It is an arithmetic number, because the mean of its divisors is an integer number (995232).

2^1990463 is an apocalyptic number.

1990463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990463 is an equidigital number, since it uses as much as digits as its factorization.

1990463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1990463 is about 1410.8376944213. The cubic root of 1990463 is about 125.7915213723.

The spelling of 1990463 in words is "one million, nine hundred ninety thousand, four hundred sixty-three".