7778113 has 12 divisors (see below), whose sum is σ = 9108372. Its totient is φ = 6622560.

The previous prime is 7778101. The next prime is 7778123. The reversal of 7778113 is 3118777.

It can be written as a sum of positive squares in 2 ways, for example, as 2729104 + 5049009 = 1652^2 + 2247^2 .

It is not a de Polignac number, because 7778113 - 2⁵ = 7778081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7778123) 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 11 ways as a sum of consecutive naturals, for example, 8431 + ... + 9307.

It is an arithmetic number, because the mean of its divisors is an integer number (759031).

Almost surely, 2^7778113 is an apocalyptic number.

It is an amenable number.

7778113 is a deficient number, since it is larger than the sum of its proper divisors (1330259).

7778113 is a wasteful number, since it uses less digits than its factorization.

7778113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072 (or 1065 counting only the distinct ones).

The product of its digits is 8232, while the sum is 34.

The square root of 7778113 is about 2788.9268545446. The cubic root of 7778113 is about 198.1335781961.

The spelling of 7778113 in words is "seven million, seven hundred seventy-eight thousand, one hundred thirteen".