623123407 has 2 divisors, whose sum is σ = 623123408. Its totient is φ = 623123406.

The previous prime is 623123329. The next prime is 623123437. The reversal of 623123407 is 704321326.

623123407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623123407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623123437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311561703 + 311561704.

It is an arithmetic number, because the mean of its divisors is an integer number (311561704).

Almost surely, 2^623123407 is an apocalyptic number.

623123407 is a deficient number, since it is larger than the sum of its proper divisors (1).

623123407 is an equidigital number, since it uses as much as digits as its factorization.

623123407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 623123407 is about 24962.4399248150. The cubic root of 623123407 is about 854.1314010944.

The spelling of 623123407 in words is "six hundred twenty-three million, one hundred twenty-three thousand, four hundred seven".