2197807 has 6 divisors (see below), whose sum is σ = 2271984. Its totient is φ = 2125980.

The previous prime is 2197799. The next prime is 2197847. The reversal of 2197807 is 7087912.

It is not a de Polignac number, because 2197807 - 2³ = 2197799 is a prime.

It is an Ulam number.

It is the 1483-rd Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197847) by changing a digit.

It is a nontrivial repunit in base 1482.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 183 + ... + 2104.

It is an arithmetic number, because the mean of its divisors is an integer number (378664).

2^2197807 is an apocalyptic number.

2197807 is a deficient number, since it is larger than the sum of its proper divisors (74177).

2197807 is an equidigital number, since it uses as much as digits as its factorization.

2197807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 2197807 is about 1482.5002529511. The cubic root of 2197807 is about 130.0159152113.

The spelling of 2197807 in words is "two million, one hundred ninety-seven thousand, eight hundred seven".