2770813 has 4 divisors (see below), whose sum is σ = 2933820. Its totient is φ = 2607808.

The previous prime is 2770799. The next prime is 2770829. The reversal of 2770813 is 3180772.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1036324 + 1734489 = 1018^2 + 1317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2770813 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 (2770843) 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, 81478 + ... + 81511.

It is an arithmetic number, because the mean of its divisors is an integer number (733455).

2^2770813 is an apocalyptic number.

It is an amenable number.

2770813 is a deficient number, since it is larger than the sum of its proper divisors (163007).

2770813 is a wasteful number, since it uses less digits than its factorization.

2770813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163006.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 2770813 is about 1664.5759219693. The cubic root of 2770813 is about 140.4545261329.

The spelling of 2770813 in words is "two million, seven hundred seventy thousand, eight hundred thirteen".