100538891 has 8 divisors (see below), whose sum is σ = 102404400. Its totient is φ = 98678880.

The previous prime is 100538887. The next prime is 100538897. The reversal of 100538891 is 198835001.

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

It is a cyclic number.

It is not a de Polignac number, because 100538891 - 2² = 100538887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100538897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59405 + ... + 61073.

It is an arithmetic number, because the mean of its divisors is an integer number (12800550).

Almost surely, 2^100538891 is an apocalyptic number.

100538891 is a deficient number, since it is larger than the sum of its proper divisors (1865509).

100538891 is a wasteful number, since it uses less digits than its factorization.

100538891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 100538891 is about 10026.9083470430. The cubic root of 100538891 is about 464.9911602744.

The spelling of 100538891 in words is "one hundred million, five hundred thirty-eight thousand, eight hundred ninety-one".