2190397 has 8 divisors (see below), whose sum is σ = 2413152. Its totient is φ = 1971600.

The previous prime is 2190389. The next prime is 2190403. The reversal of 2190397 is 7930912.

2190397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2190397 - 2³ = 2190389 is a prime.

It is a Duffinian number.

2190397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247 + ... + 2107.

It is an arithmetic number, because the mean of its divisors is an integer number (301644).

2^2190397 is an apocalyptic number.

It is an amenable number.

2190397 is a deficient number, since it is larger than the sum of its proper divisors (222755).

2190397 is a wasteful number, since it uses less digits than its factorization.

2190397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 2190397 is about 1479.9989864861. The cubic root of 2190397 is about 129.8696326215.

The spelling of 2190397 in words is "two million, one hundred ninety thousand, three hundred ninety-seven".