104891906 has 16 divisors (see below), whose sum is σ = 179946816. Its totient is φ = 44920656.

The previous prime is 104891893. The next prime is 104891909. The reversal of 104891906 is 609198401.

It is a happy number.

It is a super-2 number, since 2×104891906² = 22004623888625672, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 104891906.

It is not an unprimeable number, because it can be changed into a prime (104891909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33020 + ... + 36056.

It is an arithmetic number, because the mean of its divisors is an integer number (11246676).

Almost surely, 2^104891906 is an apocalyptic number.

104891906 is a deficient number, since it is larger than the sum of its proper divisors (75054910).

104891906 is a wasteful number, since it uses less digits than its factorization.

104891906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5513.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 104891906 is about 10241.6749606693. The cubic root of 104891906 is about 471.6074521564.

The spelling of 104891906 in words is "one hundred four million, eight hundred ninety-one thousand, nine hundred six".