2787298813 has 4 divisors (see below), whose sum is σ = 3001706428. Its totient is φ = 2572891200.

The previous prime is 2787298781. The next prime is 2787298849. The reversal of 2787298813 is 3188927872.

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 313927524 + 2473371289 = 17718^2 + 49733^2 .

It is a cyclic number.

It is not a de Polignac number, because 2787298813 - 2⁵ = 2787298781 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 (2787298013) 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, 107203788 + ... + 107203813.

It is an arithmetic number, because the mean of its divisors is an integer number (750426607).

Almost surely, 2^2787298813 is an apocalyptic number.

It is an amenable number.

2787298813 is a deficient number, since it is larger than the sum of its proper divisors (214407615).

2787298813 is a wasteful number, since it uses less digits than its factorization.

2787298813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214407614.

The product of its digits is 2709504, while the sum is 55.

The square root of 2787298813 is about 52794.8748743664. The cubic root of 2787298813 is about 1407.3253477709.

The spelling of 2787298813 in words is "two billion, seven hundred eighty-seven million, two hundred ninety-eight thousand, eight hundred thirteen".