623409863 has 2 divisors, whose sum is σ = 623409864. Its totient is φ = 623409862.

The previous prime is 623409851. The next prime is 623409881. The reversal of 623409863 is 368904326.

623409863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 623409863 - 2¹² = 623405767 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 623409863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623409803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311704931 + 311704932.

It is an arithmetic number, because the mean of its divisors is an integer number (311704932).

Almost surely, 2^623409863 is an apocalyptic number.

623409863 is a deficient number, since it is larger than the sum of its proper divisors (1).

623409863 is an equidigital number, since it uses as much as digits as its factorization.

623409863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 623409863 is about 24968.1770059410. The cubic root of 623409863 is about 854.2622652640.

The spelling of 623409863 in words is "six hundred twenty-three million, four hundred nine thousand, eight hundred sixty-three".