80998105 has 4 divisors (see below), whose sum is σ = 97197732. Its totient is φ = 64798480.

The previous prime is 80998103. The next prime is 80998117. The reversal of 80998105 is 50189908.

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 22429696 + 58568409 = 4736^2 + 7653^2 .

It is not a de Polignac number, because 80998105 - 2¹ = 80998103 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80998103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8099806 + ... + 8099815.

It is an arithmetic number, because the mean of its divisors is an integer number (24299433).

Almost surely, 2^80998105 is an apocalyptic number.

It is an amenable number.

80998105 is a deficient number, since it is larger than the sum of its proper divisors (16199627).

80998105 is a wasteful number, since it uses less digits than its factorization.

80998105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16199626.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 80998105 is about 8999.8947216065. The cubic root of 80998105 is about 432.6714969141.

The spelling of 80998105 in words is "eighty million, nine hundred ninety-eight thousand, one hundred five".