385817123 has 2 divisors, whose sum is σ = 385817124. Its totient is φ = 385817122.

The previous prime is 385817017. The next prime is 385817149. The reversal of 385817123 is 321718583.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 385817123 - 2¹² = 385813027 is a prime.

It is not a weakly prime, because it can be changed into another prime (385813123) 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, 192908561 + 192908562.

It is an arithmetic number, because the mean of its divisors is an integer number (192908562).

Almost surely, 2^385817123 is an apocalyptic number.

385817123 is a deficient number, since it is larger than the sum of its proper divisors (1).

385817123 is an equidigital number, since it uses as much as digits as its factorization.

385817123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 385817123 is about 19642.2280559004. The cubic root of 385817123 is about 727.9929374541.

The spelling of 385817123 in words is "three hundred eighty-five million, eight hundred seventeen thousand, one hundred twenty-three".