641144027 has 2 divisors, whose sum is σ = 641144028. Its totient is φ = 641144026.

The previous prime is 641144011. The next prime is 641144039. The reversal of 641144027 is 720441146.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641144027 - 2⁴ = 641144011 is a prime.

It is a super-2 number, since 2×641144027² = 822131326715553458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641144047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320572013 + 320572014.

It is an arithmetic number, because the mean of its divisors is an integer number (320572014).

Almost surely, 2^641144027 is an apocalyptic number.

641144027 is a deficient number, since it is larger than the sum of its proper divisors (1).

641144027 is an equidigital number, since it uses as much as digits as its factorization.

641144027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 641144027 is about 25320.8220048244. The cubic root of 641144027 is about 862.2870560769.

The spelling of 641144027 in words is "six hundred forty-one million, one hundred forty-four thousand, twenty-seven".