2194429 has 2 divisors, whose sum is σ = 2194430. Its totient is φ = 2194428.

The previous prime is 2194421. The next prime is 2194441. The reversal of 2194429 is 9244912.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1505529 + 688900 = 1227^2 + 830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2194429 - 2³ = 2194421 is a prime.

2194429 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2194429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2194421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097214 + 1097215.

It is an arithmetic number, because the mean of its divisors is an integer number (1097215).

2^2194429 is an apocalyptic number.

It is an amenable number.

2194429 is a deficient number, since it is larger than the sum of its proper divisors (1).

2194429 is an equidigital number, since it uses as much as digits as its factorization.

2194429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 2194429 is about 1481.3605233028. The cubic root of 2194429 is about 129.9492701471.

The spelling of 2194429 in words is "two million, one hundred ninety-four thousand, four hundred twenty-nine".