1663322 has 4 divisors (see below), whose sum is σ = 2494986. Its totient is φ = 831660.

The previous prime is 1663309. The next prime is 1663327. The reversal of 1663322 is 2233661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2233661 = 467 ⋅4783.

It can be written as a sum of positive squares in only one way, i.e., 1510441 + 152881 = 1229^2 + 391^2 .

It is not an unprimeable number, because it can be changed into a prime (1663327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415829 + ... + 415832.

2^1663322 is an apocalyptic number.

1663322 is a deficient number, since it is larger than the sum of its proper divisors (831664).

1663322 is an equidigital number, since it uses as much as digits as its factorization.

1663322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831663.

The product of its digits is 1296, while the sum is 23.

The square root of 1663322 is about 1289.6984143590. The cubic root of 1663322 is about 118.4837462203.

Adding to 1663322 its reverse (2233661), we get a palindrome (3896983).

The spelling of 1663322 in words is "one million, six hundred sixty-three thousand, three hundred twenty-two".