7143813 has 6 divisors (see below), whose sum is σ = 10318854. Its totient is φ = 4762536.

The previous prime is 7143797. The next prime is 7143821. The reversal of 7143813 is 3183417.

It can be written as a sum of positive squares in only one way, i.e., 6066369 + 1077444 = 2463^2 + 1038^2 .

It is not a de Polignac number, because 7143813 - 2⁴ = 7143797 is a prime.

It is a super-3 number, since 3×7143813³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7143883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 396870 + ... + 396887.

It is an arithmetic number, because the mean of its divisors is an integer number (1719809).

Almost surely, 2^7143813 is an apocalyptic number.

It is an amenable number.

7143813 is a deficient number, since it is larger than the sum of its proper divisors (3175041).

7143813 is a wasteful number, since it uses less digits than its factorization.

7143813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793763 (or 793760 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 7143813 is about 2672.7912376390. The cubic root of 7143813 is about 192.5942687774.

The spelling of 7143813 in words is "seven million, one hundred forty-three thousand, eight hundred thirteen".