100491898 has 16 divisors (see below), whose sum is σ = 162612576. Its totient is φ = 46301040.

The previous prime is 100491887. The next prime is 100491901. The reversal of 100491898 is 898194001.

It is a self number, because there is not a number n which added to its sum of digits gives 100491898.

It is an unprimeable number.

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, 13713 + ... + 19723.

It is an arithmetic number, because the mean of its divisors is an integer number (10163286).

Almost surely, 2^100491898 is an apocalyptic number.

100491898 is a deficient number, since it is larger than the sum of its proper divisors (62120678).

100491898 is a wasteful number, since it uses less digits than its factorization.

100491898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669.

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

The square root of 100491898 is about 10024.5647287052. The cubic root of 100491898 is about 464.9187016308.

The spelling of 100491898 in words is "one hundred million, four hundred ninety-one thousand, eight hundred ninety-eight".