7813398783 has 4 divisors (see below), whose sum is σ = 10417865048. Its totient is φ = 5208932520.

The previous prime is 7813398779. The next prime is 7813398797. The reversal of 7813398783 is 3878933187.

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

It is not a de Polignac number, because 7813398783 - 2² = 7813398779 is a prime.

It is a super-2 number, since 2×7813398783² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7813397783) 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, 1302233128 + ... + 1302233133.

It is an arithmetic number, because the mean of its divisors is an integer number (2604466262).

Almost surely, 2^7813398783 is an apocalyptic number.

7813398783 is a deficient number, since it is larger than the sum of its proper divisors (2604466265).

7813398783 is a wasteful number, since it uses less digits than its factorization.

7813398783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604466264.

The product of its digits is 6096384, while the sum is 57.

The square root of 7813398783 is about 88393.4317865304. The cubic root of 7813398783 is about 1984.3274042600.

The spelling of 7813398783 in words is "seven billion, eight hundred thirteen million, three hundred ninety-eight thousand, seven hundred eighty-three".