180809001 has 6 divisors (see below), whose sum is σ = 261168570. Its totient is φ = 120539328.

The previous prime is 180808993. The next prime is 180809017. The reversal of 180809001 is 100908081.

It can be written as a sum of positive squares in only one way, i.e., 179426025 + 1382976 = 13395^2 + 1176^2 .

It is not a de Polignac number, because 180809001 - 2³ = 180808993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180809021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10044936 + ... + 10044953.

It is an arithmetic number, because the mean of its divisors is an integer number (43528095).

Almost surely, 2^180809001 is an apocalyptic number.

It is an amenable number.

180809001 is a deficient number, since it is larger than the sum of its proper divisors (80359569).

180809001 is a wasteful number, since it uses less digits than its factorization.

180809001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20089895 (or 20089892 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 180809001 is about 13446.5237515129. The cubic root of 180809001 is about 565.4662410925.

The spelling of 180809001 in words is "one hundred eighty million, eight hundred nine thousand, one".