1309123 has 2 divisors, whose sum is σ = 1309124. Its totient is φ = 1309122.

The previous prime is 1309117. The next prime is 1309127. The reversal of 1309123 is 3219031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1309123 - 2⁹ = 1308611 is a prime.

1309123 is a lucky number.

It is equal to p₁₀₀₆₆₆ and since 1309123 and 100666 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1309123.

It is not a weakly prime, because it can be changed into another prime (1309127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654561 + 654562.

It is an arithmetic number, because the mean of its divisors is an integer number (654562).

2^1309123 is an apocalyptic number.

1309123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309123 is an equidigital number, since it uses as much as digits as its factorization.

1309123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 1309123 is about 1144.1691308544. The cubic root of 1309123 is about 109.3939953947.

The spelling of 1309123 in words is "one million, three hundred nine thousand, one hundred twenty-three".