104689729 has 2 divisors, whose sum is σ = 104689730. Its totient is φ = 104689728.

The previous prime is 104689693. The next prime is 104689747. The reversal of 104689729 is 927986401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83759104 + 20930625 = 9152^2 + 4575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104689729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (104689789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52344864 + 52344865.

It is an arithmetic number, because the mean of its divisors is an integer number (52344865).

Almost surely, 2^104689729 is an apocalyptic number.

It is an amenable number.

104689729 is a deficient number, since it is larger than the sum of its proper divisors (1).

104689729 is an equidigital number, since it uses as much as digits as its factorization.

104689729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 104689729 is about 10231.7998905373. The cubic root of 104689729 is about 471.3042527018.

The spelling of 104689729 in words is "one hundred four million, six hundred eighty-nine thousand, seven hundred twenty-nine".