641434943 has 2 divisors, whose sum is σ = 641434944. Its totient is φ = 641434942.

The previous prime is 641434883. The next prime is 641434979. The reversal of 641434943 is 349434146.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641434943 is a prime.

It is a super-2 number, since 2×641434943² = 822877572202826498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641434897 and 641434906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641434643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320717471 + 320717472.

It is an arithmetic number, because the mean of its divisors is an integer number (320717472).

Almost surely, 2^641434943 is an apocalyptic number.

641434943 is a deficient number, since it is larger than the sum of its proper divisors (1).

641434943 is an equidigital number, since it uses as much as digits as its factorization.

641434943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 38.

The square root of 641434943 is about 25326.5659535595. The cubic root of 641434943 is about 862.4174558826.

The spelling of 641434943 in words is "six hundred forty-one million, four hundred thirty-four thousand, nine hundred forty-three".