80019009 has 30 divisors (see below), whose sum is σ = 139057314. Its totient is φ = 45722880.

The previous prime is 80018963. The next prime is 80019011. The reversal of 80019009 is 90091008.

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 7683984 = 8505^2 + 2772^2 .

It is not a de Polignac number, because 80019009 - 2¹³ = 80010817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (80019209) 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 29 ways as a sum of consecutive naturals, for example, 6112 + ... + 14049.

Almost surely, 2^80019009 is an apocalyptic number.

It is an amenable number.

80019009 is a deficient number, since it is larger than the sum of its proper divisors (59038305).

80019009 is a wasteful number, since it uses less digits than its factorization.

80019009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20187 (or 20171 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 80019009 is about 8945.3344822874. The cubic root of 80019009 is about 430.9210633445.

The spelling of 80019009 in words is "eighty million, nineteen thousand, nine".