80100009 has 20 divisors (see below), whose sum is σ = 130534800. Its totient is φ = 48544920.

The previous prime is 80099989. The next prime is 80100011. The reversal of 80100009 is 90000108.

It is not a de Polignac number, because 80100009 - 2¹⁷ = 79968937 is a prime.

It is a super-2 number, since 2×80100009² = 12832022883600162, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80099964 and 80100000.

It is not an unprimeable number, because it can be changed into a prime (80100049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44059 + ... + 45840.

It is an arithmetic number, because the mean of its divisors is an integer number (6526740).

Almost surely, 2^80100009 is an apocalyptic number.

It is an amenable number.

80100009 is a deficient number, since it is larger than the sum of its proper divisors (50434791).

80100009 is a wasteful number, since it uses less digits than its factorization.

80100009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89922 (or 89913 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 80100009 is about 8949.8608369069. The cubic root of 80100009 is about 431.0664156205.

Subtracting 80100009 from its reverse (90000108), we obtain a palindrome (9900099).

The spelling of 80100009 in words is "eighty million, one hundred thousand, nine".