386617381 has 2 divisors, whose sum is σ = 386617382. Its totient is φ = 386617380.

The previous prime is 386617313. The next prime is 386617421. The reversal of 386617381 is 183716683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346294881 + 40322500 = 18609^2 + 6350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-386617381 is a prime.

It is a super-2 number, since 2×386617381² = 298945998582598322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386617981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193308690 + 193308691.

It is an arithmetic number, because the mean of its divisors is an integer number (193308691).

Almost surely, 2^386617381 is an apocalyptic number.

It is an amenable number.

386617381 is a deficient number, since it is larger than the sum of its proper divisors (1).

386617381 is an equidigital number, since it uses as much as digits as its factorization.

386617381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 386617381 is about 19662.5883596235. The cubic root of 386617381 is about 728.4959217314.

The spelling of 386617381 in words is "three hundred eighty-six million, six hundred seventeen thousand, three hundred eighty-one".