387918149 has 2 divisors, whose sum is σ = 387918150. Its totient is φ = 387918148.

The previous prime is 387918143. The next prime is 387918163. The reversal of 387918149 is 941819783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365497924 + 22420225 = 19118^2 + 4735^2 .

It is an emirp because it is prime and its reverse (941819783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 387918149 - 2¹² = 387914053 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 387918097 and 387918106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387918143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193959074 + 193959075.

It is an arithmetic number, because the mean of its divisors is an integer number (193959075).

Almost surely, 2^387918149 is an apocalyptic number.

It is an amenable number.

387918149 is a deficient number, since it is larger than the sum of its proper divisors (1).

387918149 is an equidigital number, since it uses as much as digits as its factorization.

387918149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 50.

The square root of 387918149 is about 19695.6378165319. The cubic root of 387918149 is about 729.3120114698.

The spelling of 387918149 in words is "three hundred eighty-seven million, nine hundred eighteen thousand, one hundred forty-nine".