641478107 has 2 divisors, whose sum is σ = 641478108. Its totient is φ = 641478106.

The previous prime is 641478077. The next prime is 641478109. The reversal of 641478107 is 701874146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641478107 - 2¹⁸ = 641215963 is a prime.

It is a super-2 number, since 2×641478107² = 822988323520606898, which contains 22 as substring.

Together with 641478109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (641478109) 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, 320739053 + 320739054.

It is an arithmetic number, because the mean of its divisors is an integer number (320739054).

Almost surely, 2^641478107 is an apocalyptic number.

641478107 is a deficient number, since it is larger than the sum of its proper divisors (1).

641478107 is an equidigital number, since it uses as much as digits as its factorization.

641478107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 641478107 is about 25327.4180879141. The cubic root of 641478107 is about 862.4368002981.

The spelling of 641478107 in words is "six hundred forty-one million, four hundred seventy-eight thousand, one hundred seven".