100840691 has 8 divisors (see below), whose sum is σ = 115315200. Its totient is φ = 86383368.

The previous prime is 100840643. The next prime is 100840693. The reversal of 100840691 is 196048001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100840691 is a prime.

It is a super-2 number, since 2×100840691² = 20337689922714962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100840693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12860 + ... + 19158.

It is an arithmetic number, because the mean of its divisors is an integer number (14414400).

Almost surely, 2^100840691 is an apocalyptic number.

100840691 is a deficient number, since it is larger than the sum of its proper divisors (14474509).

100840691 is an equidigital number, since it uses as much as digits as its factorization.

100840691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8593.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 100840691 is about 10041.9465742455. The cubic root of 100840691 is about 465.4559692813.

Adding to 100840691 its reverse (196048001), we get a palindrome (296888692).

The spelling of 100840691 in words is "one hundred million, eight hundred forty thousand, six hundred ninety-one".