100689139 has 2 divisors, whose sum is σ = 100689140. Its totient is φ = 100689138.

The previous prime is 100689133. The next prime is 100689163. The reversal of 100689139 is 931986001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100689139 - 2⁵ = 100689107 is a prime.

It is a super-2 number, since 2×100689139² = 20276605425122642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100689098 and 100689107.

It is not a weakly prime, because it can be changed into another prime (100689133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50344569 + 50344570.

It is an arithmetic number, because the mean of its divisors is an integer number (50344570).

Almost surely, 2^100689139 is an apocalyptic number.

100689139 is a deficient number, since it is larger than the sum of its proper divisors (1).

100689139 is an equidigital number, since it uses as much as digits as its factorization.

100689139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 100689139 is about 10034.3977896035. The cubic root of 100689139 is about 465.2226767148. Note that the first 3 decimals are identical.

The spelling of 100689139 in words is "one hundred million, six hundred eighty-nine thousand, one hundred thirty-nine".