340640563 has 2 divisors, whose sum is σ = 340640564. Its totient is φ = 340640562.

The previous prime is 340640551. The next prime is 340640567. The reversal of 340640563 is 365046043.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340640563 is a prime.

It is not a weakly prime, because it can be changed into another prime (340640567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170320281 + 170320282.

It is an arithmetic number, because the mean of its divisors is an integer number (170320282).

Almost surely, 2^340640563 is an apocalyptic number.

340640563 is a deficient number, since it is larger than the sum of its proper divisors (1).

340640563 is an equidigital number, since it uses as much as digits as its factorization.

340640563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 340640563 is about 18456.4504442214. The cubic root of 340640563 is about 698.3912463798.

The spelling of 340640563 in words is "three hundred forty million, six hundred forty thousand, five hundred sixty-three".