642100343 has 2 divisors, whose sum is σ = 642100344. Its totient is φ = 642100342.

The previous prime is 642100309. The next prime is 642100351. The reversal of 642100343 is 343001246.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642100343 - 2⁸ = 642100087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642100843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321050171 + 321050172.

It is an arithmetic number, because the mean of its divisors is an integer number (321050172).

Almost surely, 2^642100343 is an apocalyptic number.

642100343 is a deficient number, since it is larger than the sum of its proper divisors (1).

642100343 is an equidigital number, since it uses as much as digits as its factorization.

642100343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 642100343 is about 25339.6989524343. The cubic root of 642100343 is about 862.7155657506.

Adding to 642100343 its reverse (343001246), we get a palindrome (985101589).

The spelling of 642100343 in words is "six hundred forty-two million, one hundred thousand, three hundred forty-three".