100990001 has 16 divisors (see below), whose sum is σ = 118032768. Its totient is φ = 84624000.

The previous prime is 100989989. The next prime is 100990007. The reversal of 100990001 is 100099001.

It is a cyclic number.

It is not a de Polignac number, because 100990001 - 2¹⁴ = 100973617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100990007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57821 + ... + 59541.

It is an arithmetic number, because the mean of its divisors is an integer number (7377048).

Almost surely, 2^100990001 is an apocalyptic number.

It is an amenable number.

100990001 is a deficient number, since it is larger than the sum of its proper divisors (17042767).

100990001 is a wasteful number, since it uses less digits than its factorization.

100990001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 100990001 is about 10049.3781399647. The cubic root of 100990001 is about 465.6855821418.

It can be divided in two parts, 10099000 and 1, that added together give a palindrome (10099001).

The spelling of 100990001 in words is "one hundred million, nine hundred ninety thousand, one".