1622789 has 4 divisors (see below), whose sum is σ = 1854624. Its totient is φ = 1390956.

The previous prime is 1622779. The next prime is 1622791. The reversal of 1622789 is 9872261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1622789 - 2⁴ = 1622773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622729) 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, 115907 + ... + 115920.

It is an arithmetic number, because the mean of its divisors is an integer number (463656).

2^1622789 is an apocalyptic number.

It is an amenable number.

1622789 is a deficient number, since it is larger than the sum of its proper divisors (231835).

1622789 is an equidigital number, since it uses as much as digits as its factorization.

1622789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231834.

The product of its digits is 12096, while the sum is 35.

The square root of 1622789 is about 1273.8873576577. The cubic root of 1622789 is about 117.5133891488.

The spelling of 1622789 in words is "one million, six hundred twenty-two thousand, seven hundred eighty-nine".