342640663 has 2 divisors, whose sum is σ = 342640664. Its totient is φ = 342640662.

The previous prime is 342640657. The next prime is 342640679. The reversal of 342640663 is 366046243.

It is a weak prime.

It is an emirp because it is prime and its reverse (366046243) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342640663 is a prime.

It is a super-3 number, since 3×342640663³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342640603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171320331 + 171320332.

It is an arithmetic number, because the mean of its divisors is an integer number (171320332).

Almost surely, 2^342640663 is an apocalyptic number.

342640663 is a deficient number, since it is larger than the sum of its proper divisors (1).

342640663 is an equidigital number, since it uses as much as digits as its factorization.

342640663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 34.

The square root of 342640663 is about 18510.5554481760. Note that the first 3 decimals coincide. The cubic root of 342640663 is about 699.7554676482.

The spelling of 342640663 in words is "three hundred forty-two million, six hundred forty thousand, six hundred sixty-three".