387278341 has 2 divisors, whose sum is σ = 387278342. Its totient is φ = 387278340.

The previous prime is 387278179. The next prime is 387278357. The reversal of 387278341 is 143872783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377330625 + 9947716 = 19425^2 + 3154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387278341 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387278141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193639170 + 193639171.

It is an arithmetic number, because the mean of its divisors is an integer number (193639171).

Almost surely, 2^387278341 is an apocalyptic number.

It is an amenable number.

387278341 is a deficient number, since it is larger than the sum of its proper divisors (1).

387278341 is an equidigital number, since it uses as much as digits as its factorization.

387278341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 43.

The square root of 387278341 is about 19679.3887354257. The cubic root of 387278341 is about 728.9108302467.

The spelling of 387278341 in words is "three hundred eighty-seven million, two hundred seventy-eight thousand, three hundred forty-one".