9091801 has 4 divisors (see below), whose sum is σ = 9112500. Its totient is φ = 9071104.

The previous prime is 9091783. The next prime is 9091807. The reversal of 9091801 is 1081909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1081909 = 283 ⋅3823.

It can be written as a sum of positive squares in 2 ways, for example, as 4096576 + 4995225 = 2024^2 + 2235^2 .

It is a cyclic number.

It is not a de Polignac number, because 9091801 - 2⁵ = 9091769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9091801.

It is not an unprimeable number, because it can be changed into a prime (9091807) 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 3 ways as a sum of consecutive naturals, for example, 9676 + ... + 10573.

It is an arithmetic number, because the mean of its divisors is an integer number (2278125).

Almost surely, 2^9091801 is an apocalyptic number.

It is an amenable number.

9091801 is a deficient number, since it is larger than the sum of its proper divisors (20699).

9091801 is a wasteful number, since it uses less digits than its factorization.

9091801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20698.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 9091801 is about 3015.2613485401. The cubic root of 9091801 is about 208.7132274142.

The spelling of 9091801 in words is "nine million, ninety-one thousand, eight hundred one".