6255993 has 4 divisors (see below), whose sum is σ = 8341328. Its totient is φ = 4170660.

The previous prime is 6255989. The next prime is 6256013. The reversal of 6255993 is 3995526.

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 6255993 - 2² = 6255989 is a prime.

It is a D-number.

It is a Duffinian number.

6255993 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6255913) 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, 1042663 + ... + 1042668.

It is an arithmetic number, because the mean of its divisors is an integer number (2085332).

Almost surely, 2^6255993 is an apocalyptic number.

It is an amenable number.

6255993 is a deficient number, since it is larger than the sum of its proper divisors (2085335).

6255993 is a wasteful number, since it uses less digits than its factorization.

6255993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085334.

The product of its digits is 72900, while the sum is 39.

The square root of 6255993 is about 2501.1983128093. The cubic root of 6255993 is about 184.2604318592.

The spelling of 6255993 in words is "six million, two hundred fifty-five thousand, nine hundred ninety-three".