340000387 has 2 divisors, whose sum is σ = 340000388. Its totient is φ = 340000386.

The previous prime is 340000361. The next prime is 340000399. The reversal of 340000387 is 783000043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340000387 - 2⁷ = 340000259 is a prime.

It is not a weakly prime, because it can be changed into another prime (340030387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170000193 + 170000194.

It is an arithmetic number, because the mean of its divisors is an integer number (170000194).

Almost surely, 2^340000387 is an apocalyptic number.

340000387 is a deficient number, since it is larger than the sum of its proper divisors (1).

340000387 is an equidigital number, since it uses as much as digits as its factorization.

340000387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 340000387 is about 18439.0994085937. The cubic root of 340000387 is about 697.9534695024.

The spelling of 340000387 in words is "three hundred forty million, three hundred eighty-seven", and thus it is an aban number.