100906491 has 16 divisors (see below), whose sum is σ = 153914624. Its totient is φ = 57603744.

The previous prime is 100906483. The next prime is 100906493. The reversal of 100906491 is 194609001.

It is not a de Polignac number, because 100906491 - 2³ = 100906483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100906493) 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, 28860 + ... + 32166.

It is an arithmetic number, because the mean of its divisors is an integer number (9619664).

Almost surely, 2^100906491 is an apocalyptic number.

100906491 is a deficient number, since it is larger than the sum of its proper divisors (53008133).

100906491 is a wasteful number, since it uses less digits than its factorization.

100906491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 100906491 is about 10045.2222971918. Note that the first 4 decimals coincide. The cubic root of 100906491 is about 465.5571861723.

The spelling of 100906491 in words is "one hundred million, nine hundred six thousand, four hundred ninety-one".