80820001 has 4 divisors (see below), whose sum is σ = 81158400. Its totient is φ = 80481604.

The previous prime is 80819987. The next prime is 80820017. The reversal of 80820001 is 10002808.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80820001 - 2⁷ = 80819873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80820041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168841 + ... + 169318.

It is an arithmetic number, because the mean of its divisors is an integer number (20289600).

Almost surely, 2^80820001 is an apocalyptic number.

It is an amenable number.

80820001 is a deficient number, since it is larger than the sum of its proper divisors (338399).

80820001 is a wasteful number, since it uses less digits than its factorization.

80820001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338398.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 80820001 is about 8989.9944938804. The cubic root of 80820001 is about 432.3541352700.

Adding to 80820001 its reverse (10002808), we get a palindrome (90822809).

The spelling of 80820001 in words is "eighty million, eight hundred twenty thousand, one".