2188913 has 2 divisors, whose sum is σ = 2188914. Its totient is φ = 2188912.

The previous prime is 2188909. The next prime is 2188919. The reversal of 2188913 is 3198812.

2188913 is nontrivially palindromic in base 11.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2053489 + 135424 = 1433^2 + 368^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188913 - 2² = 2188909 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2188913.

It is not a weakly prime, because it can be changed into another prime (2188919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094456 + 1094457.

It is an arithmetic number, because the mean of its divisors is an integer number (1094457).

2^2188913 is an apocalyptic number.

It is an amenable number.

2188913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188913 is an equidigital number, since it uses as much as digits as its factorization.

2188913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 2188913 is about 1479.4975498459. The cubic root of 2188913 is about 129.8402969843.

The spelling of 2188913 in words is "two million, one hundred eighty-eight thousand, nine hundred thirteen".