623879 has 2 divisors, whose sum is σ = 623880. Its totient is φ = 623878.

The previous prime is 623869. The next prime is 623881. The reversal of 623879 is 978326.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 623879 - 2¹⁶ = 558343 is a prime.

It is a Sophie Germain prime.

Together with 623881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311939 + 311940.

It is an arithmetic number, because the mean of its divisors is an integer number (311940).

2⁶²³⁸⁷⁹ is an apocalyptic number.

623879 is a deficient number, since it is larger than the sum of its proper divisors (1).

623879 is an equidigital number, since it uses as much as digits as its factorization.

623879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 623879 is about 789.8601141974. The cubic root of 623879 is about 85.4476498613.

The spelling of 623879 in words is "six hundred twenty-three thousand, eight hundred seventy-nine".