2809429 has 4 divisors (see below), whose sum is σ = 3210784. Its totient is φ = 2408076.

The previous prime is 2809423. The next prime is 2809439. The reversal of 2809429 is 9249082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2809429 - 2⁹ = 2808917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2809394 and 2809403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2809423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200667 + ... + 200680.

It is an arithmetic number, because the mean of its divisors is an integer number (802696).

2^2809429 is an apocalyptic number.

It is an amenable number.

2809429 is a deficient number, since it is larger than the sum of its proper divisors (401355).

2809429 is an equidigital number, since it uses as much as digits as its factorization.

2809429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401354.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 2809429 is about 1676.1351377499. The cubic root of 2809429 is about 141.1040092365.

It can be divided in two parts, 28094 and 29, that multiplied together give a triangular number (814726 = T₁₂₇₆).

The spelling of 2809429 in words is "two million, eight hundred nine thousand, four hundred twenty-nine".