1622623 has 4 divisors (see below), whose sum is σ = 1625320. Its totient is φ = 1619928.

The previous prime is 1622617. The next prime is 1622639. The reversal of 1622623 is 3262261.

It is a happy number.

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 1622623 - 2⁵ = 1622591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1622594 and 1622603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13 + ... + 1801.

It is an arithmetic number, because the mean of its divisors is an integer number (406330).

2^1622623 is an apocalyptic number.

1622623 is a deficient number, since it is larger than the sum of its proper divisors (2697).

1622623 is an equidigital number, since it uses as much as digits as its factorization.

1622623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696.

The product of its digits is 864, while the sum is 22.

The square root of 1622623 is about 1273.8222010940. The cubic root of 1622623 is about 117.5093820787.

Adding to 1622623 its reverse (3262261), we get a palindrome (4884884).

The spelling of 1622623 in words is "one million, six hundred twenty-two thousand, six hundred twenty-three".