2278429 has 2 divisors, whose sum is σ = 2278430. Its totient is φ = 2278428.

The previous prime is 2278421. The next prime is 2278453. The reversal of 2278429 is 9248722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1375929 + 902500 = 1173^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 2278429 - 2³ = 2278421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2278394 and 2278403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2278421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139214 + 1139215.

It is an arithmetic number, because the mean of its divisors is an integer number (1139215).

2^2278429 is an apocalyptic number.

It is an amenable number.

2278429 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278429 is an equidigital number, since it uses as much as digits as its factorization.

2278429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 2278429 is about 1509.4465873293. The cubic root of 2278429 is about 131.5866508079.

The spelling of 2278429 in words is "two million, two hundred seventy-eight thousand, four hundred twenty-nine".