100689494189 has 2 divisors, whose sum is σ = 100689494190. Its totient is φ = 100689494188.

The previous prime is 100689494177. The next prime is 100689494209. The reversal of 100689494189 is 981494986001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98136213289 + 2553280900 = 313267^2 + 50530^2 .

It is a cyclic number.

It is not a de Polignac number, because 100689494189 - 2²⁸ = 100421058733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100689490189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50344747094 + 50344747095.

It is an arithmetic number, because the mean of its divisors is an integer number (50344747095).

Almost surely, 2^100689494189 is an apocalyptic number.

It is an amenable number.

100689494189 is a deficient number, since it is larger than the sum of its proper divisors (1).

100689494189 is an equidigital number, since it uses as much as digits as its factorization.

100689494189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 59.

The spelling of 100689494189 in words is "one hundred billion, six hundred eighty-nine million, four hundred ninety-four thousand, one hundred eighty-nine".