641604107 has 2 divisors, whose sum is σ = 641604108. Its totient is φ = 641604106.

The previous prime is 641604101. The next prime is 641604133. The reversal of 641604107 is 701406146.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641604107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 641604107.

It is not a weakly prime, because it can be changed into another prime (641604101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320802053 + 320802054.

It is an arithmetic number, because the mean of its divisors is an integer number (320802054).

Almost surely, 2^641604107 is an apocalyptic number.

641604107 is a deficient number, since it is larger than the sum of its proper divisors (1).

641604107 is an equidigital number, since it uses as much as digits as its factorization.

641604107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 641604107 is about 25329.9053886903. The cubic root of 641604107 is about 862.4932636035.

The spelling of 641604107 in words is "six hundred forty-one million, six hundred four thousand, one hundred seven".