641317063 has 2 divisors, whose sum is σ = 641317064. Its totient is φ = 641317062.

The previous prime is 641317043. The next prime is 641317067. The reversal of 641317063 is 360713146.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641317063 is a prime.

It is a super-2 number, since 2×641317063² = 822575150589891938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641317067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320658531 + 320658532.

It is an arithmetic number, because the mean of its divisors is an integer number (320658532).

Almost surely, 2^641317063 is an apocalyptic number.

641317063 is a deficient number, since it is larger than the sum of its proper divisors (1).

641317063 is an equidigital number, since it uses as much as digits as its factorization.

641317063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 641317063 is about 25324.2386460087. The cubic root of 641317063 is about 862.3646222585.

The spelling of 641317063 in words is "six hundred forty-one million, three hundred seventeen thousand, sixty-three".