641145343 has 2 divisors, whose sum is σ = 641145344. Its totient is φ = 641145342.

The previous prime is 641145299. The next prime is 641145347. The reversal of 641145343 is 343541146.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641145343 - 2¹³ = 641137151 is a prime.

It is a super-2 number, since 2×641145343² = 822134701701175298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641145347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320572671 + 320572672.

It is an arithmetic number, because the mean of its divisors is an integer number (320572672).

Almost surely, 2^641145343 is an apocalyptic number.

641145343 is a deficient number, since it is larger than the sum of its proper divisors (1).

641145343 is an equidigital number, since it uses as much as digits as its factorization.

641145343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 641145343 is about 25320.8479913292. The cubic root of 641145343 is about 862.2876460478.

Adding to 641145343 its reverse (343541146), we get a palindrome (984686489).

The spelling of 641145343 in words is "six hundred forty-one million, one hundred forty-five thousand, three hundred forty-three".