385772161 has 2 divisors, whose sum is σ = 385772162. Its totient is φ = 385772160.

The previous prime is 385772119. The next prime is 385772203. The reversal of 385772161 is 161277583.

It is a balanced prime because it is at equal distance from previous prime (385772119) and next prime (385772203).

It can be written as a sum of positive squares in only one way, i.e., 296356225 + 89415936 = 17215^2 + 9456^2 .

It is a cyclic number.

It is not a de Polignac number, because 385772161 - 2¹¹ = 385770113 is a prime.

It is not a weakly prime, because it can be changed into another prime (385772111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192886080 + 192886081.

It is an arithmetic number, because the mean of its divisors is an integer number (192886081).

Almost surely, 2^385772161 is an apocalyptic number.

It is an amenable number.

385772161 is a deficient number, since it is larger than the sum of its proper divisors (1).

385772161 is an equidigital number, since it uses as much as digits as its factorization.

385772161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 40.

The square root of 385772161 is about 19641.0834986260. The cubic root of 385772161 is about 727.9646569657.

The spelling of 385772161 in words is "three hundred eighty-five million, seven hundred seventy-two thousand, one hundred sixty-one".