623841 has 4 divisors (see below), whose sum is σ = 831792. Its totient is φ = 415892.

The previous prime is 623839. The next prime is 623851. The reversal of 623841 is 148326.

It is a happy number.

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 623841 - 2¹ = 623839 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (623851) 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, 103971 + ... + 103976.

It is an arithmetic number, because the mean of its divisors is an integer number (207948).

2⁶²³⁸⁴¹ is an apocalyptic number.

It is an amenable number.

623841 is a deficient number, since it is larger than the sum of its proper divisors (207951).

623841 is a wasteful number, since it uses less digits than its factorization.

623841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207950.

The product of its digits is 1152, while the sum is 24.

The square root of 623841 is about 789.8360589388. The cubic root of 623841 is about 85.4459149754.

The spelling of 623841 in words is "six hundred twenty-three thousand, eight hundred forty-one".