80812105 has 8 divisors (see below), whose sum is σ = 105790464. Its totient is φ = 58772400.

The previous prime is 80812103. The next prime is 80812153. The reversal of 80812105 is 50121808.

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

It is not a de Polignac number, because 80812105 - 2¹ = 80812103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80812105.

It is not an unprimeable number, because it can be changed into a prime (80812103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734601 + ... + 734710.

It is an arithmetic number, because the mean of its divisors is an integer number (13223808).

Almost surely, 2^80812105 is an apocalyptic number.

It is an amenable number.

80812105 is a deficient number, since it is larger than the sum of its proper divisors (24978359).

80812105 is a wasteful number, since it uses less digits than its factorization.

80812105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469327.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 80812105 is about 8989.5553282685. Note that the first 3 decimals coincide. The cubic root of 80812105 is about 432.3400546819.

The spelling of 80812105 in words is "eighty million, eight hundred twelve thousand, one hundred five".