340120213 has 4 divisors (see below), whose sum is σ = 344779468. Its totient is φ = 335460960.

The previous prime is 340120211. The next prime is 340120219. The reversal of 340120213 is 312021043.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312021043 = 17 ⋅18354179.

It can be written as a sum of positive squares in 2 ways, for example, as 136258929 + 203861284 = 11673^2 + 14278^2 .

It is a cyclic number.

It is not a de Polignac number, because 340120213 - 2¹ = 340120211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340120211) 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, 2329518 + ... + 2329663.

It is an arithmetic number, because the mean of its divisors is an integer number (86194867).

Almost surely, 2^340120213 is an apocalyptic number.

It is an amenable number.

340120213 is a deficient number, since it is larger than the sum of its proper divisors (4659255).

340120213 is an equidigital number, since it uses as much as digits as its factorization.

340120213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4659254.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 340120213 is about 18442.3483591434. The cubic root of 340120213 is about 698.0354528890.

Adding to 340120213 its reverse (312021043), we get a palindrome (652141256).

The spelling of 340120213 in words is "three hundred forty million, one hundred twenty thousand, two hundred thirteen".