80170009 has 12 divisors (see below), whose sum is σ = 83142444. Its totient is φ = 77298624.

The previous prime is 80170003. The next prime is 80170021. The reversal of 80170009 is 90007108.

It can be written as a sum of positive squares in 6 ways, for example, as 10497600 + 69672409 = 3240^2 + 8347^2 .

It is not a de Polignac number, because 80170009 - 2²³ = 71781401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80170003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214747 + ... + 215119.

It is an arithmetic number, because the mean of its divisors is an integer number (6928537).

Almost surely, 2^80170009 is an apocalyptic number.

It is an amenable number.

80170009 is a deficient number, since it is larger than the sum of its proper divisors (2972435).

80170009 is a wasteful number, since it uses less digits than its factorization.

80170009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 80170009 is about 8953.7706582199. The cubic root of 80170009 is about 431.1919497862.

It can be divided in two parts, 80 and 170009, that multiplied together give a triangular number (13600720 = T₅₂₁₅).

The spelling of 80170009 in words is "eighty million, one hundred seventy thousand, nine".