2780913 has 4 divisors (see below), whose sum is σ = 3707888. Its totient is φ = 1853940.

The previous prime is 2780909. The next prime is 2780923. The reversal of 2780913 is 3190872.

It is a happy number.

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 not a de Polignac number, because 2780913 - 2² = 2780909 is a prime.

It is a super-2 number, since 2×2780913² = 15466954227138, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780923) 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, 463483 + ... + 463488.

It is an arithmetic number, because the mean of its divisors is an integer number (926972).

2^2780913 is an apocalyptic number.

It is an amenable number.

2780913 is a deficient number, since it is larger than the sum of its proper divisors (926975).

2780913 is an equidigital number, since it uses as much as digits as its factorization.

2780913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926974.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2780913 is about 1667.6069680833. The cubic root of 2780913 is about 140.6249779753.

The spelling of 2780913 in words is "two million, seven hundred eighty thousand, nine hundred thirteen".