385749643 has 2 divisors, whose sum is σ = 385749644. Its totient is φ = 385749642.

The previous prime is 385749641. The next prime is 385749671. The reversal of 385749643 is 346947583.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 385749643 - 2¹ = 385749641 is a prime.

Together with 385749641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (385749641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192874821 + 192874822.

It is an arithmetic number, because the mean of its divisors is an integer number (192874822).

Almost surely, 2^385749643 is an apocalyptic number.

385749643 is a deficient number, since it is larger than the sum of its proper divisors (1).

385749643 is an equidigital number, since it uses as much as digits as its factorization.

385749643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 49.

The square root of 385749643 is about 19640.5102530459. The cubic root of 385749643 is about 727.9504926232.

The spelling of 385749643 in words is "three hundred eighty-five million, seven hundred forty-nine thousand, six hundred forty-three".