387166243 has 2 divisors, whose sum is σ = 387166244. Its totient is φ = 387166242.

The previous prime is 387166183. The next prime is 387166271. The reversal of 387166243 is 342661783.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387166243 is a prime.

It is a super-3 number, since 3×387166243³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 387166196 and 387166205.

It is not a weakly prime, because it can be changed into another prime (387166343) 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, 193583121 + 193583122.

It is an arithmetic number, because the mean of its divisors is an integer number (193583122).

Almost surely, 2^387166243 is an apocalyptic number.

387166243 is a deficient number, since it is larger than the sum of its proper divisors (1).

387166243 is an equidigital number, since it uses as much as digits as its factorization.

387166243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 40.

The square root of 387166243 is about 19676.5404225438. The cubic root of 387166243 is about 728.8404955352.

The spelling of 387166243 in words is "three hundred eighty-seven million, one hundred sixty-six thousand, two hundred forty-three".