104728661 has 2 divisors, whose sum is σ = 104728662. Its totient is φ = 104728660.

The previous prime is 104728601. The next prime is 104728727. The reversal of 104728661 is 166827401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70728100 + 34000561 = 8410^2 + 5831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104728661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104728601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52364330 + 52364331.

It is an arithmetic number, because the mean of its divisors is an integer number (52364331).

Almost surely, 2^104728661 is an apocalyptic number.

It is an amenable number.

104728661 is a deficient number, since it is larger than the sum of its proper divisors (1).

104728661 is an equidigital number, since it uses as much as digits as its factorization.

104728661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 104728661 is about 10233.7022137641. The cubic root of 104728661 is about 471.3626683117.

The spelling of 104728661 in words is "one hundred four million, seven hundred twenty-eight thousand, six hundred sixty-one".