340202389 has 4 divisors (see below), whose sum is σ = 346621356. Its totient is φ = 333783424.

The previous prime is 340202381. The next prime is 340202449. The reversal of 340202389 is 983202043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 273240900 + 66961489 = 16530^2 + 8183^2 .

It is a cyclic number.

It is not a de Polignac number, because 340202389 - 2³ = 340202381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340202389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340202381) 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 in 3 ways as a sum of consecutive naturals, for example, 3209404 + ... + 3209509.

It is an arithmetic number, because the mean of its divisors is an integer number (86655339).

Almost surely, 2^340202389 is an apocalyptic number.

It is an amenable number.

340202389 is a deficient number, since it is larger than the sum of its proper divisors (6418967).

340202389 is an equidigital number, since it uses as much as digits as its factorization.

340202389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6418966.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 340202389 is about 18444.5761404268. The cubic root of 340202389 is about 698.0916655065.

The spelling of 340202389 in words is "three hundred forty million, two hundred two thousand, three hundred eighty-nine".