6427389 has 4 divisors (see below), whose sum is σ = 8569856. Its totient is φ = 4284924.

The previous prime is 6427367. The next prime is 6427433. The reversal of 6427389 is 9837246.

6427389 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 6427389 - 2⁹ = 6426877 is a prime.

It is a super-2 number, since 2×6427389² = 82622658714642, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6² + 4 + 2¹⁷ + 7⁸ + 3³ + 8 + 9⁶ .

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6427349) 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, 1071229 + ... + 1071234.

It is an arithmetic number, because the mean of its divisors is an integer number (2142464).

Almost surely, 2^6427389 is an apocalyptic number.

It is an amenable number.

6427389 is a deficient number, since it is larger than the sum of its proper divisors (2142467).

6427389 is a wasteful number, since it uses less digits than its factorization.

6427389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142466.

The product of its digits is 72576, while the sum is 39.

The square root of 6427389 is about 2535.2295754034. The cubic root of 6427389 is about 185.9280274204.

The spelling of 6427389 in words is "six million, four hundred twenty-seven thousand, three hundred eighty-nine".