385611971 has 4 divisors (see below), whose sum is σ = 387267192. Its totient is φ = 383956752.

The previous prime is 385611959. The next prime is 385611979. The reversal of 385611971 is 179116583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179116583 = 1481 ⋅120943.

It is a cyclic number.

It is not a de Polignac number, because 385611971 - 2⁶ = 385611907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385611979) 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, 827261 + ... + 827726.

It is an arithmetic number, because the mean of its divisors is an integer number (96816798).

Almost surely, 2^385611971 is an apocalyptic number.

385611971 is a deficient number, since it is larger than the sum of its proper divisors (1655221).

385611971 is a wasteful number, since it uses less digits than its factorization.

385611971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655220.

The product of its digits is 45360, while the sum is 41.

The square root of 385611971 is about 19637.0051433512. The cubic root of 385611971 is about 727.8638817631.

The spelling of 385611971 in words is "three hundred eighty-five million, six hundred eleven thousand, nine hundred seventy-one".