340561513 has 2 divisors, whose sum is σ = 340561514. Its totient is φ = 340561512.

The previous prime is 340561489. The next prime is 340561519. The reversal of 340561513 is 315165043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338118544 + 2442969 = 18388^2 + 1563^2 .

It is an emirp because it is prime and its reverse (315165043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340561513 - 2²⁵ = 307007081 is a prime.

It is not a weakly prime, because it can be changed into another prime (340561519) 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 as a sum of consecutive naturals, namely, 170280756 + 170280757.

It is an arithmetic number, because the mean of its divisors is an integer number (170280757).

Almost surely, 2^340561513 is an apocalyptic number.

It is an amenable number.

340561513 is a deficient number, since it is larger than the sum of its proper divisors (1).

340561513 is an equidigital number, since it uses as much as digits as its factorization.

340561513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 340561513 is about 18454.3087922577. The cubic root of 340561513 is about 698.3372186596.

The spelling of 340561513 in words is "three hundred forty million, five hundred sixty-one thousand, five hundred thirteen".