2785479509 has 4 divisors (see below), whose sum is σ = 2789229216. Its totient is φ = 2781729804.

The previous prime is 2785479497. The next prime is 2785479511. The reversal of 2785479509 is 9059745872.

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 2785479509 - 2¹⁶ = 2785413973 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 (2785479559) 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, 1873739 + ... + 1875224.

It is an arithmetic number, because the mean of its divisors is an integer number (697307304).

Almost surely, 2^2785479509 is an apocalyptic number.

It is an amenable number.

2785479509 is a deficient number, since it is larger than the sum of its proper divisors (3749707).

2785479509 is an equidigital number, since it uses as much as digits as its factorization.

2785479509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3749706.

The product of its (nonzero) digits is 6350400, while the sum is 56.

The square root of 2785479509 is about 52777.6421318725. The cubic root of 2785479509 is about 1407.0190883101.

The spelling of 2785479509 in words is "two billion, seven hundred eighty-five million, four hundred seventy-nine thousand, five hundred nine".