6426997 has 4 divisors (see below), whose sum is σ = 6765280. Its totient is φ = 6088716.

The previous prime is 6426989. The next prime is 6427007. The reversal of 6426997 is 7996246.

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 a cyclic number.

It is not a de Polignac number, because 6426997 - 2³ = 6426989 is a prime.

It is a d-powerful number, because it can be written as 6² + 4¹⁰ + 2⁹ + 6⁶ + 9⁶ + 9⁷ + 7⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6426907) 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, 169113 + ... + 169150.

It is an arithmetic number, because the mean of its divisors is an integer number (1691320).

Almost surely, 2^6426997 is an apocalyptic number.

It is an amenable number.

6426997 is a deficient number, since it is larger than the sum of its proper divisors (338283).

6426997 is a wasteful number, since it uses less digits than its factorization.

6426997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338282.

The product of its digits is 163296, while the sum is 43.

The square root of 6426997 is about 2535.1522636718. The cubic root of 6426997 is about 185.9242474890.

The spelling of 6426997 in words is "six million, four hundred twenty-six thousand, nine hundred ninety-seven".