1990363 has 4 divisors (see below), whose sum is σ = 2000008. Its totient is φ = 1980720.

The previous prime is 1990361. The next prime is 1990379. The reversal of 1990363 is 3630991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1990363 - 2¹ = 1990361 is a prime.

It is a Duffinian number.

1990363 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1990361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4506 + ... + 4927.

It is an arithmetic number, because the mean of its divisors is an integer number (500002).

2^1990363 is an apocalyptic number.

1990363 is a deficient number, since it is larger than the sum of its proper divisors (9645).

1990363 is an equidigital number, since it uses as much as digits as its factorization.

1990363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9644.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 1990363 is about 1410.8022540385. The cubic root of 1990363 is about 125.7894147665.

The spelling of 1990363 in words is "one million, nine hundred ninety thousand, three hundred sixty-three".