6623389 has 2 divisors, whose sum is σ = 6623390. Its totient is φ = 6623388.

The previous prime is 6623371. The next prime is 6623401. The reversal of 6623389 is 9833266.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5736025 + 887364 = 2395^2 + 942^2 .

It is a cyclic number.

It is not a de Polignac number, because 6623389 - 2⁷ = 6623261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6623369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3311694 + 3311695.

It is an arithmetic number, because the mean of its divisors is an integer number (3311695).

Almost surely, 2^6623389 is an apocalyptic number.

It is an amenable number.

6623389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6623389 is an equidigital number, since it uses as much as digits as its factorization.

6623389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 37.

The square root of 6623389 is about 2573.5945679147. The cubic root of 6623389 is about 187.7990628886.

The spelling of 6623389 in words is "six million, six hundred twenty-three thousand, three hundred eighty-nine".