108129689 has 2 divisors, whose sum is σ = 108129690. Its totient is φ = 108129688.

The previous prime is 108129667. The next prime is 108129737. The reversal of 108129689 is 986921801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61889689 + 46240000 = 7867^2 + 6800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108129689 is a prime.

It is not a weakly prime, because it can be changed into another prime (108129289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54064844 + 54064845.

It is an arithmetic number, because the mean of its divisors is an integer number (54064845).

Almost surely, 2^108129689 is an apocalyptic number.

It is an amenable number.

108129689 is a deficient number, since it is larger than the sum of its proper divisors (1).

108129689 is an equidigital number, since it uses as much as digits as its factorization.

108129689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 108129689 is about 10398.5426382739. The cubic root of 108129689 is about 476.4108582812.

The spelling of 108129689 in words is "one hundred eight million, one hundred twenty-nine thousand, six hundred eighty-nine".