100489891 has 8 divisors (see below), whose sum is σ = 103869200. Its totient is φ = 97145568.

The previous prime is 100489877. The next prime is 100489913. The reversal of 100489891 is 198984001.

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 100489891 - 2⁵ = 100489859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100489801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2841 + ... + 14458.

It is an arithmetic number, because the mean of its divisors is an integer number (12983650).

Almost surely, 2^100489891 is an apocalyptic number.

100489891 is a deficient number, since it is larger than the sum of its proper divisors (3379309).

100489891 is a wasteful number, since it uses less digits than its factorization.

100489891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17493.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 100489891 is about 10024.4646241084. The cubic root of 100489891 is about 464.9156065288.

The spelling of 100489891 in words is "one hundred million, four hundred eighty-nine thousand, eight hundred ninety-one".