100989505 has 8 divisors (see below), whose sum is σ = 121636224. Its totient is φ = 80492400.

The previous prime is 100989463. The next prime is 100989509. The reversal of 100989505 is 505989001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-100989505 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100989509) 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 7 ways as a sum of consecutive naturals, for example, 35911 + ... + 38620.

It is an arithmetic number, because the mean of its divisors is an integer number (15204528).

Almost surely, 2^100989505 is an apocalyptic number.

It is an amenable number.

100989505 is a deficient number, since it is larger than the sum of its proper divisors (20646719).

100989505 is an equidigital number, since it uses as much as digits as its factorization.

100989505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74807.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 100989505 is about 10049.3534617905. The cubic root of 100989505 is about 465.6848197547.

The spelling of 100989505 in words is "one hundred million, nine hundred eighty-nine thousand, five hundred five".