2197913 has 4 divisors (see below), whose sum is σ = 2327220. Its totient is φ = 2068608.

The previous prime is 2197907. The next prime is 2197919. The reversal of 2197913 is 3197912.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2197907) and next prime (2197919).

It can be written as a sum of positive squares in 2 ways, for example, as 1545049 + 652864 = 1243^2 + 808^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197913 - 2⁶ = 2197849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2197913.

It is not an unprimeable number, because it can be changed into a prime (2197919) 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, 64628 + ... + 64661.

It is an arithmetic number, because the mean of its divisors is an integer number (581805).

2^2197913 is an apocalyptic number.

It is an amenable number.

2197913 is a deficient number, since it is larger than the sum of its proper divisors (129307).

2197913 is a wasteful number, since it uses less digits than its factorization.

2197913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129306.

The product of its digits is 3402, while the sum is 32.

The square root of 2197913 is about 1482.5360029355. The cubic root of 2197913 is about 130.0180053956.

Subtracting 2197913 from its reverse (3197912), we obtain a palindrome (999999).

The spelling of 2197913 in words is "two million, one hundred ninety-seven thousand, nine hundred thirteen".