1663363 has 4 divisors (see below), whose sum is σ = 1791328. Its totient is φ = 1535400.

The previous prime is 1663351. The next prime is 1663373. The reversal of 1663363 is 3633661.

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 1663363 - 2⁹ = 1662851 is a prime.

It is a Duffinian number.

1663363 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1663303) 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, 63963 + ... + 63988.

It is an arithmetic number, because the mean of its divisors is an integer number (447832).

2^1663363 is an apocalyptic number.

1663363 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1663363 is a deficient number, since it is larger than the sum of its proper divisors (127965).

1663363 is a wasteful number, since it uses less digits than its factorization.

1663363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127964.

The product of its digits is 5832, while the sum is 28.

The square root of 1663363 is about 1289.7143094500. The cubic root of 1663363 is about 118.4847197327.

The spelling of 1663363 in words is "one million, six hundred sixty-three thousand, three hundred sixty-three".