80891801 has 4 divisors (see below), whose sum is σ = 80911104. Its totient is φ = 80872500.

The previous prime is 80891753. The next prime is 80891819. The reversal of 80891801 is 10819808.

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 80891801 - 2²² = 76697497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80891201) 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, 425 + ... + 12726.

It is an arithmetic number, because the mean of its divisors is an integer number (20227776).

Almost surely, 2^80891801 is an apocalyptic number.

It is an amenable number.

80891801 is a deficient number, since it is larger than the sum of its proper divisors (19303).

80891801 is a wasteful number, since it uses less digits than its factorization.

80891801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19302.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 80891801 is about 8993.9869357254. The cubic root of 80891801 is about 432.4821309735.

The spelling of 80891801 in words is "eighty million, eight hundred ninety-one thousand, eight hundred one".