104213173661 has 2 divisors, whose sum is σ = 104213173662. Its totient is φ = 104213173660.

The previous prime is 104213173639. The next prime is 104213173699. The reversal of 104213173661 is 166371312401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59694705625 + 44518468036 = 244325^2 + 210994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104213173661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104213173601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52106586830 + 52106586831.

It is an arithmetic number, because the mean of its divisors is an integer number (52106586831).

Almost surely, 2^104213173661 is an apocalyptic number.

It is an amenable number.

104213173661 is a deficient number, since it is larger than the sum of its proper divisors (1).

104213173661 is an equidigital number, since it uses as much as digits as its factorization.

104213173661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 104213173661 in words is "one hundred four billion, two hundred thirteen million, one hundred seventy-three thousand, six hundred sixty-one".