2729409 has 4 divisors (see below), whose sum is σ = 3639216. Its totient is φ = 1819604.

The previous prime is 2729383. The next prime is 2729413. The reversal of 2729409 is 9049272.

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 2729409 - 2¹⁵ = 2696641 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2729409.

It is not an unprimeable number, because it can be changed into a prime (2729429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454899 + ... + 454904.

It is an arithmetic number, because the mean of its divisors is an integer number (909804).

2^2729409 is an apocalyptic number.

It is an amenable number.

2729409 is a deficient number, since it is larger than the sum of its proper divisors (909807).

2729409 is an equidigital number, since it uses as much as digits as its factorization.

2729409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909806.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 2729409 is about 1652.0923097696. The cubic root of 2729409 is about 139.7514126049.

The spelling of 2729409 in words is "two million, seven hundred twenty-nine thousand, four hundred nine".