100689090 has 16 divisors (see below), whose sum is σ = 241653888. Its totient is φ = 26850416.

The previous prime is 100689067. The next prime is 100689091. The reversal of 100689090 is 90986001.

It is a happy number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (100689091) 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, 1678122 + ... + 1678181.

It is an arithmetic number, because the mean of its divisors is an integer number (15103368).

Almost surely, 2^100689090 is an apocalyptic number.

100689090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100689090 is an abundant number, since it is smaller than the sum of its proper divisors (140964798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100689090 is a wasteful number, since it uses less digits than its factorization.

100689090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3356313.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 100689090 is about 10034.3953480018. The cubic root of 100689090 is about 465.2226012485. Note that the first 3 decimals are identical.

The spelling of 100689090 in words is "one hundred million, six hundred eighty-nine thousand, ninety".