2189497 has 4 divisors (see below), whose sum is σ = 2192500. Its totient is φ = 2186496.

The previous prime is 2189491. The next prime is 2189513. The reversal of 2189497 is 7949812.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 383161 + 1806336 = 619^2 + 1344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2189497 is a prime.

It is a super-2 number, since 2×2189497² = 9587794226018, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2189491) 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, 373 + ... + 2125.

It is an arithmetic number, because the mean of its divisors is an integer number (548125).

2^2189497 is an apocalyptic number.

It is an amenable number.

2189497 is a deficient number, since it is larger than the sum of its proper divisors (3003).

2189497 is a wasteful number, since it uses less digits than its factorization.

2189497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002.

The product of its digits is 36288, while the sum is 40.

The square root of 2189497 is about 1479.6949009847. The cubic root of 2189497 is about 129.8518430486.

The spelling of 2189497 in words is "two million, one hundred eighty-nine thousand, four hundred ninety-seven".