386444381 has 2 divisors, whose sum is σ = 386444382. Its totient is φ = 386444380.

The previous prime is 386444309. The next prime is 386444389. The reversal of 386444381 is 183444683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203518756 + 182925625 = 14266^2 + 13525^2 .

It is an emirp because it is prime and its reverse (183444683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 386444381 - 2²⁶ = 319335517 is a prime.

It is a super-2 number, since 2×386444381² = 298678519212946322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386444389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193222190 + 193222191.

It is an arithmetic number, because the mean of its divisors is an integer number (193222191).

Almost surely, 2^386444381 is an apocalyptic number.

It is an amenable number.

386444381 is a deficient number, since it is larger than the sum of its proper divisors (1).

386444381 is an equidigital number, since it uses as much as digits as its factorization.

386444381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 41.

The square root of 386444381 is about 19658.1886500257. The cubic root of 386444381 is about 728.3872452952.

The spelling of 386444381 in words is "three hundred eighty-six million, four hundred forty-four thousand, three hundred eighty-one".