6423965 has 4 divisors (see below), whose sum is σ = 7708764. Its totient is φ = 5139168.

The previous prime is 6423953. The next prime is 6423997. The reversal of 6423965 is 5693246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2184484 + 4239481 = 1478^2 + 2059^2 .

It is a cyclic number.

It is not a de Polignac number, because 6423965 - 2²⁰ = 5375389 is a prime.

It is a d-powerful number, because it can be written as 6 + 4 + 2 + 3¹³ + 9⁷ + 6⁶ + 5 .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642392 + ... + 642401.

It is an arithmetic number, because the mean of its divisors is an integer number (1927191).

Almost surely, 2^6423965 is an apocalyptic number.

It is an amenable number.

6423965 is a deficient number, since it is larger than the sum of its proper divisors (1284799).

6423965 is a wasteful number, since it uses less digits than its factorization.

6423965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284798.

The product of its digits is 38880, while the sum is 35.

The square root of 6423965 is about 2534.5542014327. The cubic root of 6423965 is about 185.8950056834.

The spelling of 6423965 in words is "six million, four hundred twenty-three thousand, nine hundred sixty-five".