2192989 has 4 divisors (see below), whose sum is σ = 2198620. Its totient is φ = 2187360.

The previous prime is 2192963. The next prime is 2193007. The reversal of 2192989 is 9892912.

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 1020100 + 1172889 = 1010^2 + 1083^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2192989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2192089) 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, 2184 + ... + 3025.

It is an arithmetic number, because the mean of its divisors is an integer number (549655).

2^2192989 is an apocalyptic number.

It is an amenable number.

2192989 is a deficient number, since it is larger than the sum of its proper divisors (5631).

2192989 is an equidigital number, since it uses as much as digits as its factorization.

2192989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5630.

The product of its digits is 23328, while the sum is 40.

The square root of 2192989 is about 1480.8744038574. The cubic root of 2192989 is about 129.9208393806.

The spelling of 2192989 in words is "two million, one hundred ninety-two thousand, nine hundred eighty-nine".