2790781117 has 4 divisors (see below), whose sum is σ = 2790952576. Its totient is φ = 2790609660.

The previous prime is 2790781109. The next prime is 2790781139. The reversal of 2790781117 is 7111870972.

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 2790781117 - 2³ = 2790781109 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 (2790781177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58413 + ... + 94834.

It is an arithmetic number, because the mean of its divisors is an integer number (697738144).

Almost surely, 2^2790781117 is an apocalyptic number.

It is an amenable number.

2790781117 is a deficient number, since it is larger than the sum of its proper divisors (171459).

2790781117 is a wasteful number, since it uses less digits than its factorization.

2790781117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171458.

The product of its (nonzero) digits is 49392, while the sum is 43.

The square root of 2790781117 is about 52827.8441449204. The cubic root of 2790781117 is about 1407.9111832010.

The spelling of 2790781117 in words is "two billion, seven hundred ninety million, seven hundred eighty-one thousand, one hundred seventeen".