2188429 has 2 divisors, whose sum is σ = 2188430. Its totient is φ = 2188428.

The previous prime is 2188411. The next prime is 2188447. The reversal of 2188429 is 9248812.

It is a balanced prime because it is at equal distance from previous prime (2188411) and next prime (2188447).

It can be written as a sum of positive squares in only one way, i.e., 2036329 + 152100 = 1427^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188429 - 2¹⁵ = 2155661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2188394 and 2188403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2188409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094214 + 1094215.

It is an arithmetic number, because the mean of its divisors is an integer number (1094215).

2^2188429 is an apocalyptic number.

It is an amenable number.

2188429 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188429 is an equidigital number, since it uses as much as digits as its factorization.

2188429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 34.

The square root of 2188429 is about 1479.3339717589. Note that the first 3 decimals coincide. The cubic root of 2188429 is about 129.8307264294.

The spelling of 2188429 in words is "two million, one hundred eighty-eight thousand, four hundred twenty-nine".