100004945 has 8 divisors (see below), whose sum is σ = 122933160. Its totient is φ = 78052480.

The previous prime is 100004929. The next prime is 100004981. The reversal of 100004945 is 549400001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14922769 + 85082176 = 3863^2 + 9224^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100004945 - 2⁴ = 100004929 is a prime.

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 100004945.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243710 + ... + 244119.

It is an arithmetic number, because the mean of its divisors is an integer number (15366645).

Almost surely, 2^100004945 is an apocalyptic number.

It is an amenable number.

100004945 is a deficient number, since it is larger than the sum of its proper divisors (22928215).

100004945 is an equidigital number, since it uses as much as digits as its factorization.

100004945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487875.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 100004945 is about 10000.2472469434. The cubic root of 100004945 is about 464.1665341208.

Adding to 100004945 its reverse (549400001), we get a palindrome (649404946).

The spelling of 100004945 in words is "one hundred million, four thousand, nine hundred forty-five".