340320653 has 4 divisors (see below), whose sum is σ = 340366428. Its totient is φ = 340274880.

The previous prime is 340320641. The next prime is 340320661. The reversal of 340320653 is 356023043.

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 209149444 + 131171209 = 14462^2 + 11453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340320653 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 (340320613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8876 + ... + 27557.

It is an arithmetic number, because the mean of its divisors is an integer number (85091607).

Almost surely, 2^340320653 is an apocalyptic number.

It is an amenable number.

340320653 is a deficient number, since it is larger than the sum of its proper divisors (45775).

340320653 is an equidigital number, since it uses as much as digits as its factorization.

340320653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45774.

The product of its (nonzero) digits is 6480, while the sum is 26.

The square root of 340320653 is about 18447.7817907737. The cubic root of 340320653 is about 698.1725482894.

Adding to 340320653 its reverse (356023043), we get a palindrome (696343696).

The spelling of 340320653 in words is "three hundred forty million, three hundred twenty thousand, six hundred fifty-three".