100842689 has 4 divisors (see below), whose sum is σ = 101187156. Its totient is φ = 100498224.

The previous prime is 100842673. The next prime is 100842701. The reversal of 100842689 is 986248001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59985025 + 40857664 = 7745^2 + 6392^2 .

It is a cyclic number.

It is not a de Polignac number, because 100842689 - 2⁴ = 100842673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100842619) 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 in 3 ways as a sum of consecutive naturals, for example, 171794 + ... + 172379.

It is an arithmetic number, because the mean of its divisors is an integer number (25296789).

Almost surely, 2^100842689 is an apocalyptic number.

It is an amenable number.

100842689 is a deficient number, since it is larger than the sum of its proper divisors (344467).

100842689 is an equidigital number, since it uses as much as digits as its factorization.

100842689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344466.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 100842689 is about 10042.0460564568. The cubic root of 100842689 is about 465.4590433541.

The spelling of 100842689 in words is "one hundred million, eight hundred forty-two thousand, six hundred eighty-nine".