2197969 has 4 divisors (see below), whose sum is σ = 2251620. Its totient is φ = 2144320.

The previous prime is 2197961. The next prime is 2197973. The reversal of 2197969 is 9697912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57600 + 2140369 = 240^2 + 1463^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197969 - 2³ = 2197961 is a prime.

It is a super-2 number, since 2×2197969² = 9662135449922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2197961) 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, 26764 + ... + 26845.

It is an arithmetic number, because the mean of its divisors is an integer number (562905).

2^2197969 is an apocalyptic number.

It is an amenable number.

2197969 is a deficient number, since it is larger than the sum of its proper divisors (53651).

2197969 is an equidigital number, since it uses as much as digits as its factorization.

2197969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53650.

The product of its digits is 61236, while the sum is 43.

The square root of 2197969 is about 1482.5548893717. The cubic root of 2197969 is about 130.0191096168.

The spelling of 2197969 in words is "two million, one hundred ninety-seven thousand, nine hundred sixty-nine".