1663622 has 4 divisors (see below), whose sum is σ = 2495436. Its totient is φ = 831810.

The previous prime is 1663619. The next prime is 1663681. The reversal of 1663622 is 2263661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2263661 = 47 ⋅48163.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1663591 and 1663600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415904 + ... + 415907.

It is an arithmetic number, because the mean of its divisors is an integer number (623859).

2^1663622 is an apocalyptic number.

1663622 is a deficient number, since it is larger than the sum of its proper divisors (831814).

1663622 is an equidigital number, since it uses as much as digits as its factorization.

1663622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831813.

The product of its digits is 2592, while the sum is 26.

The square root of 1663622 is about 1289.8147153758. The cubic root of 1663622 is about 118.4908691119.

The spelling of 1663622 in words is "one million, six hundred sixty-three thousand, six hundred twenty-two".