6428623 has 2 divisors, whose sum is σ = 6428624. Its totient is φ = 6428622.

The previous prime is 6428573. The next prime is 6428627. The reversal of 6428623 is 3268246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6428623 - 2¹³ = 6420431 is a prime.

It is a super-2 number, since 2×6428623² = 82654387352258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6428627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3214311 + 3214312.

It is an arithmetic number, because the mean of its divisors is an integer number (3214312).

Almost surely, 2^6428623 is an apocalyptic number.

6428623 is a deficient number, since it is larger than the sum of its proper divisors (1).

6428623 is an equidigital number, since it uses as much as digits as its factorization.

6428623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 6428623 is about 2535.4729341880. The cubic root of 6428623 is about 185.9399254868.

The spelling of 6428623 in words is "six million, four hundred twenty-eight thousand, six hundred twenty-three".