2194869 has 4 divisors (see below), whose sum is σ = 2926496. Its totient is φ = 1463244.

The previous prime is 2194847. The next prime is 2194879. The reversal of 2194869 is 9684912.

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 not a de Polignac number, because 2194869 - 2⁸ = 2194613 is a prime.

It is a super-2 number, since 2×2194869² = 9634899854322, which contains 22 as substring.

It is a D-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 (2194879) 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, 365809 + ... + 365814.

It is an arithmetic number, because the mean of its divisors is an integer number (731624).

2^2194869 is an apocalyptic number.

It is an amenable number.

2194869 is a deficient number, since it is larger than the sum of its proper divisors (731627).

2194869 is an equidigital number, since it uses as much as digits as its factorization.

2194869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731626.

The product of its digits is 31104, while the sum is 39.

The square root of 2194869 is about 1481.5090279846. The cubic root of 2194869 is about 129.9579548449.

The spelling of 2194869 in words is "two million, one hundred ninety-four thousand, eight hundred sixty-nine".