385555427 has 4 divisors (see below), whose sum is σ = 408235176. Its totient is φ = 362875680.

The previous prime is 385555421. The next prime is 385555433. The reversal of 385555427 is 724555583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724555583 = 22807 ⋅31769.

It is an interprime number because it is at equal distance from previous prime (385555421) and next prime (385555433).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385555427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385555421) 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 in 3 ways as a sum of consecutive naturals, for example, 11339849 + ... + 11339882.

It is an arithmetic number, because the mean of its divisors is an integer number (102058794).

Almost surely, 2^385555427 is an apocalyptic number.

385555427 is a deficient number, since it is larger than the sum of its proper divisors (22679749).

385555427 is a wasteful number, since it uses less digits than its factorization.

385555427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22679748.

The product of its digits is 840000, while the sum is 44.

The square root of 385555427 is about 19635.5653598260. The cubic root of 385555427 is about 727.8283033836.

The spelling of 385555427 in words is "three hundred eighty-five million, five hundred fifty-five thousand, four hundred twenty-seven".