1006123687 has 2 divisors, whose sum is σ = 1006123688. Its totient is φ = 1006123686.

The previous prime is 1006123681. The next prime is 1006123763. The reversal of 1006123687 is 7863216001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1006123687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1006123681) 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, 503061843 + 503061844.

It is an arithmetic number, because the mean of its divisors is an integer number (503061844).

Almost surely, 2^1006123687 is an apocalyptic number.

1006123687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1006123687 is an equidigital number, since it uses as much as digits as its factorization.

1006123687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1006123687 is about 31719.4528168441. The cubic root of 1006123687 is about 1002.0370765016.

Adding to 1006123687 its reverse (7863216001), we get a palindrome (8869339688).

The spelling of 1006123687 in words is "one billion, six million, one hundred twenty-three thousand, six hundred eighty-seven".