385121771 has 2 divisors, whose sum is σ = 385121772. Its totient is φ = 385121770.

The previous prime is 385121749. The next prime is 385121809. The reversal of 385121771 is 177121583.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (177121583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385121771 - 2¹⁴ = 385105387 is a prime.

It is not a weakly prime, because it can be changed into another prime (385121171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192560885 + 192560886.

It is an arithmetic number, because the mean of its divisors is an integer number (192560886).

Almost surely, 2^385121771 is an apocalyptic number.

385121771 is a deficient number, since it is larger than the sum of its proper divisors (1).

385121771 is an equidigital number, since it uses as much as digits as its factorization.

385121771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 35.

The square root of 385121771 is about 19624.5196374332. The cubic root of 385121771 is about 727.5553244574. Note that the first 3 decimals are identical.

The spelling of 385121771 in words is "three hundred eighty-five million, one hundred twenty-one thousand, seven hundred seventy-one".