387341021 has 2 divisors, whose sum is σ = 387341022. Its totient is φ = 387341020.

The previous prime is 387340957. The next prime is 387341027. The reversal of 387341021 is 120143783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231465796 + 155875225 = 15214^2 + 12485^2 .

It is a cyclic number.

It is not a de Polignac number, because 387341021 - 2⁶ = 387340957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387341027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193670510 + 193670511.

It is an arithmetic number, because the mean of its divisors is an integer number (193670511).

Almost surely, 2^387341021 is an apocalyptic number.

It is an amenable number.

387341021 is a deficient number, since it is larger than the sum of its proper divisors (1).

387341021 is an equidigital number, since it uses as much as digits as its factorization.

387341021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 387341021 is about 19680.9812001333. The cubic root of 387341021 is about 728.9501522376.

The spelling of 387341021 in words is "three hundred eighty-seven million, three hundred forty-one thousand, twenty-one".