641144047 has 2 divisors, whose sum is σ = 641144048. Its totient is φ = 641144046.

The previous prime is 641144039. The next prime is 641144057. The reversal of 641144047 is 740441146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641144047 - 2³ = 641144039 is a prime.

It is a super-2 number, since 2×641144047² = 822131378007076418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641144027) 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, 320572023 + 320572024.

It is an arithmetic number, because the mean of its divisors is an integer number (320572024).

Almost surely, 2^641144047 is an apocalyptic number.

641144047 is a deficient number, since it is larger than the sum of its proper divisors (1).

641144047 is an equidigital number, since it uses as much as digits as its factorization.

641144047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 641144047 is about 25320.8223997563. The cubic root of 641144047 is about 862.2870650431.

The spelling of 641144047 in words is "six hundred forty-one million, one hundred forty-four thousand, forty-seven".