100798805 has 4 divisors (see below), whose sum is σ = 120958572. Its totient is φ = 80639040.

The previous prime is 100798801. The next prime is 100798807. The reversal of 100798805 is 508897001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33016516 + 67782289 = 5746^2 + 8233^2 .

It is not a de Polignac number, because 100798805 - 2² = 100798801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100798801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10079876 + ... + 10079885.

It is an arithmetic number, because the mean of its divisors is an integer number (30239643).

Almost surely, 2^100798805 is an apocalyptic number.

It is an amenable number.

100798805 is a deficient number, since it is larger than the sum of its proper divisors (20159767).

100798805 is an equidigital number, since it uses as much as digits as its factorization.

100798805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20159766.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 100798805 is about 10039.8608058080. The cubic root of 100798805 is about 465.3915151788.

The spelling of 100798805 in words is "one hundred million, seven hundred ninety-eight thousand, eight hundred five".