2730509 has 4 divisors (see below), whose sum is σ = 2874240. Its totient is φ = 2586780.

The previous prime is 2730493. The next prime is 2730517. The reversal of 2730509 is 9050372.

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 2730509 - 2⁴ = 2730493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2730529) 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, 71837 + ... + 71874.

It is an arithmetic number, because the mean of its divisors is an integer number (718560).

2^2730509 is an apocalyptic number.

It is an amenable number.

2730509 is a deficient number, since it is larger than the sum of its proper divisors (143731).

2730509 is a wasteful number, since it uses less digits than its factorization.

2730509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143730.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 2730509 is about 1652.4251874139. The cubic root of 2730509 is about 139.7701841787.

The spelling of 2730509 in words is "two million, seven hundred thirty thousand, five hundred nine".