385400243 has 2 divisors, whose sum is σ = 385400244. Its totient is φ = 385400242.

The previous prime is 385400233. The next prime is 385400263. The reversal of 385400243 is 342004583.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 385400243 - 2⁶ = 385400179 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (385400203) 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, 192700121 + 192700122.

It is an arithmetic number, because the mean of its divisors is an integer number (192700122).

Almost surely, 2^385400243 is an apocalyptic number.

385400243 is a deficient number, since it is larger than the sum of its proper divisors (1).

385400243 is an equidigital number, since it uses as much as digits as its factorization.

385400243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 385400243 is about 19631.6133570321. The cubic root of 385400243 is about 727.7306412781.

The spelling of 385400243 in words is "three hundred eighty-five million, four hundred thousand, two hundred forty-three".