1000000123 has 2 divisors, whose sum is σ = 1000000124. Its totient is φ = 1000000122.

The previous prime is 1000000103. The next prime is 1000000181. The reversal of 1000000123 is 3210000001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000000123 - 2¹⁷ = 999869051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000000103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000061 + 500000062.

It is an arithmetic number, because the mean of its divisors is an integer number (500000062).

Almost surely, 2^1000000123 is an apocalyptic number.

1000000123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000000123 is an equidigital number, since it uses as much as digits as its factorization.

1000000123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 1000000123 is about 31622.7785464845. The cubic root of 1000000123 is about 1000.0000410000. Note that the first 4 decimals are identical.

Adding to 1000000123 its reverse (3210000001), we get a palindrome (4210000124).

The spelling of 1000000123 in words is "one billion, one hundred twenty-three", and thus it is an aban number.