387666361 has 2 divisors, whose sum is σ = 387666362. Its totient is φ = 387666360.

The previous prime is 387666359. The next prime is 387666401. The reversal of 387666361 is 163666783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284765625 + 102900736 = 16875^2 + 10144^2 .

It is a cyclic number.

It is not a de Polignac number, because 387666361 - 2¹ = 387666359 is a prime.

Together with 387666359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (387666341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193833180 + 193833181.

It is an arithmetic number, because the mean of its divisors is an integer number (193833181).

Almost surely, 2^387666361 is an apocalyptic number.

It is an amenable number.

387666361 is a deficient number, since it is larger than the sum of its proper divisors (1).

387666361 is an equidigital number, since it uses as much as digits as its factorization.

387666361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 46.

The square root of 387666361 is about 19689.2448052230. The cubic root of 387666361 is about 729.1541845693.

The spelling of 387666361 in words is "three hundred eighty-seven million, six hundred sixty-six thousand, three hundred sixty-one".