2731409 has 4 divisors (see below), whose sum is σ = 2741760. Its totient is φ = 2721060.

The previous prime is 2731381. The next prime is 2731427. The reversal of 2731409 is 9041372.

2731409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2731409 - 2¹² = 2727313 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2731429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4769 + ... + 5310.

It is an arithmetic number, because the mean of its divisors is an integer number (685440).

2^2731409 is an apocalyptic number.

It is an amenable number.

2731409 is a deficient number, since it is larger than the sum of its proper divisors (10351).

2731409 is a wasteful number, since it uses less digits than its factorization.

2731409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10350.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 2731409 is about 1652.6974919809. The cubic root of 2731409 is about 139.7855389895.

The spelling of 2731409 in words is "two million, seven hundred thirty-one thousand, four hundred nine".