1123423142987 has 2 divisors, whose sum is σ = 1123423142988. Its totient is φ = 1123423142986.

The previous prime is 1123423142969. The next prime is 1123423143019. The reversal of 1123423142987 is 7892413243211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123423142987 - 2¹⁰ = 1123423141963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123423142287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561711571493 + 561711571494.

It is an arithmetic number, because the mean of its divisors is an integer number (561711571494).

Almost surely, 2^{1123423142987} is an apocalyptic number.

1123423142987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123423142987 is an equidigital number, since it uses as much as digits as its factorization.

1123423142987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The spelling of 1123423142987 in words is "one trillion, one hundred twenty-three billion, four hundred twenty-three million, one hundred forty-two thousand, nine hundred eighty-seven".