2781417313 has 4 divisors (see below), whose sum is σ = 2781983380. Its totient is φ = 2780851248.

The previous prime is 2781417299. The next prime is 2781417319. The reversal of 2781417313 is 3137141872.

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 2531397969 + 250019344 = 50313^2 + 15812^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2781417313 is a prime.

It is a super-2 number, since 2×2781417313² = 15472564538112279938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2781417319) 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, 275598 + ... + 285511.

It is an arithmetic number, because the mean of its divisors is an integer number (695495845).

Almost surely, 2^2781417313 is an apocalyptic number.

It is an amenable number.

2781417313 is a deficient number, since it is larger than the sum of its proper divisors (566067).

2781417313 is an equidigital number, since it uses as much as digits as its factorization.

2781417313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566066.

The product of its digits is 28224, while the sum is 37.

The square root of 2781417313 is about 52739.1440298380. The cubic root of 2781417313 is about 1406.3347814748.

The spelling of 2781417313 in words is "two billion, seven hundred eighty-one million, four hundred seventeen thousand, three hundred thirteen".