1029909 has 4 divisors (see below), whose sum is σ = 1373216. Its totient is φ = 686604.

The previous prime is 1029907. The next prime is 1029929. The reversal of 1029909 is 9099201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9099201 = 3 ⋅3033067.

It is not a de Polignac number, because 1029909 - 2¹ = 1029907 is a prime.

It is a super-4 number, since 4×1029909⁴ (a number of 25 digits) contains 4444 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1029907) 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, 171649 + ... + 171654.

It is an arithmetic number, because the mean of its divisors is an integer number (343304).

2^1029909 is an apocalyptic number.

It is an amenable number.

1029909 is a deficient number, since it is larger than the sum of its proper divisors (343307).

1029909 is an equidigital number, since it uses as much as digits as its factorization.

1029909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343306.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 1029909 is about 1014.8443230368. The cubic root of 1029909 is about 100.9871891734.

It can be divided in two parts, 102 and 9909, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 1029909 in words is "one million, twenty-nine thousand, nine hundred nine".