3138823 has 4 divisors (see below), whose sum is σ = 3171280. Its totient is φ = 3106368.

The previous prime is 3138809. The next prime is 3138847. The reversal of 3138823 is 3288313.

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

It is a cyclic number.

It is not a de Polignac number, because 3138823 - 2⁵ = 3138791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3138791 and 3138800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3138803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16083 + ... + 16276.

It is an arithmetic number, because the mean of its divisors is an integer number (792820).

Almost surely, 2^3138823 is an apocalyptic number.

3138823 is a deficient number, since it is larger than the sum of its proper divisors (32457).

3138823 is an equidigital number, since it uses as much as digits as its factorization.

3138823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32456.

The product of its digits is 3456, while the sum is 28.

The square root of 3138823 is about 1771.6723737757. The cubic root of 3138823 is about 146.4161362319.

The spelling of 3138823 in words is "three million, one hundred thirty-eight thousand, eight hundred twenty-three".