100989556 has 12 divisors (see below), whose sum is σ = 176823360. Its totient is φ = 50468600.

The previous prime is 100989547. The next prime is 100989589. The reversal of 100989556 is 655989001.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4035 + ... + 14773.

It is an arithmetic number, because the mean of its divisors is an integer number (14735280).

Almost surely, 2^100989556 is an apocalyptic number.

It is an amenable number.

100989556 is a deficient number, since it is larger than the sum of its proper divisors (75833804).

100989556 is a wasteful number, since it uses less digits than its factorization.

100989556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13094 (or 13092 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 100989556 is about 10049.3559992668. The cubic root of 100989556 is about 465.6848981454.

The spelling of 100989556 in words is "one hundred million, nine hundred eighty-nine thousand, five hundred fifty-six".