6535623 has 4 divisors (see below), whose sum is σ = 8714168. Its totient is φ = 4357080.

The previous prime is 6535619. The next prime is 6535631. The reversal of 6535623 is 3265356.

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

It is not a de Polignac number, because 6535623 - 2² = 6535619 is a prime.

It is a D-number.

It is a Duffinian number.

6535623 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6535603) 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, 1089268 + ... + 1089273.

It is an arithmetic number, because the mean of its divisors is an integer number (2178542).

Almost surely, 2^6535623 is an apocalyptic number.

6535623 is a deficient number, since it is larger than the sum of its proper divisors (2178545).

6535623 is a wasteful number, since it uses less digits than its factorization.

6535623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178544.

The product of its digits is 16200, while the sum is 30.

The square root of 6535623 is about 2556.4864560564. The cubic root of 6535623 is about 186.9658683071.

The spelling of 6535623 in words is "six million, five hundred thirty-five thousand, six hundred twenty-three".