623867 has 2 divisors, whose sum is σ = 623868. Its totient is φ = 623866.

The previous prime is 623851. The next prime is 623869. The reversal of 623867 is 768326.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 623867 - 2⁴ = 623851 is a prime.

Together with 623869, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 623867.

It is not a weakly prime, because it can be changed into another prime (623869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311933 + 311934.

It is an arithmetic number, because the mean of its divisors is an integer number (311934).

2⁶²³⁸⁶⁷ is an apocalyptic number.

623867 is a deficient number, since it is larger than the sum of its proper divisors (1).

623867 is an equidigital number, since it uses as much as digits as its factorization.

623867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 623867 is about 789.8525178791. The cubic root of 623867 is about 85.4471020102.

The spelling of 623867 in words is "six hundred twenty-three thousand, eight hundred sixty-seven".