340642513 has 2 divisors, whose sum is σ = 340642514. Its totient is φ = 340642512.

The previous prime is 340642499. The next prime is 340642537. The reversal of 340642513 is 315246043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258341329 + 82301184 = 16073^2 + 9072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340642513 is a prime.

It is not a weakly prime, because it can be changed into another prime (340642553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170321256 + 170321257.

It is an arithmetic number, because the mean of its divisors is an integer number (170321257).

Almost surely, 2^340642513 is an apocalyptic number.

It is an amenable number.

340642513 is a deficient number, since it is larger than the sum of its proper divisors (1).

340642513 is an equidigital number, since it uses as much as digits as its factorization.

340642513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 340642513 is about 18456.5032712050. The cubic root of 340642513 is about 698.3925790263.

Adding to 340642513 its reverse (315246043), we get a palindrome (655888556).

The spelling of 340642513 in words is "three hundred forty million, six hundred forty-two thousand, five hundred thirteen".